"For years, the polar bear has been the symbol of the global warming movement. But today, the American pika has good grounds to compete with the polar bear for this unwanted honor.
American pikas are suffering because global warming has brought higher temperatures to their western mountain homes.
Pikas live in high mountain ecosystems that are cool and moist. Higher temperatures can cause the pikas to overheat.
Unlike other mountain species that can move to higher altitudes in warming climates, pikas live so high on the mountain that there is no where for them to go. Without our protection and help, American pikas could be the first species with the distinction of going extinct due to global warming. We can't let this happen!
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Description
American pikas are small, rodent-like mammals. Although they look like a squirrel or guinea pig, they're actually more closely related to rabbits and hares. Pikas have short, stout bodies with big, round ears. They do not have a visible tail.
Pikas have brown and black fur. The fur is colored to camouflage with rocks. Pika fur is thick to keep them warm in the winter. During the summer, they put on a much lighter coat of fur--however, the fur is still thick enough that a pika might overheat if exposed to very high heat for long periods of time.
Size: Pikas are about 7-8 inches long.
Diet: Pikas are herbivores. They especially love grasses, weeds and tall wildflowers that grow in their rocky, high mountain habitat.
Pikas like to be prepared! In the winter months, there are a lot less grasses and flowers growing in the mountains. To prepare for the lean times, pikas like to save up food during the summer. A pika will collect a pile of extra wildflowers and grasses and lay them out in the sun. The sun's heat dries the plants so they do not get moldy. The plants are stored in the pika's den until winter.
Typical Lifespan: American pikas can live around 6-7 years. Many die after 3 or 4 years.
Habitat
American pikas are found in alpine terrain, above the tree line, on mountains. They live on rock faces, talus and cliffs near mountain meadows. Talus is a rocky area on the side of cliffs, slopes or hillsides.
Range: American pikas live on high-elevation cool mountains west of the Rocky Mountains. They can be found in Montana, Wyoming, Colorado, Idaho, Washington, Oregon, California, Nevada, Utah and New Mexico.
How Pikas Communicate
American pikas are often heard before they are seen. They make calls and sing to define and protect their territory, alert others to the presence of dangers and attract mates. The call sounds like the bleat of lamb, but more high-pitched and squeaky.
Life History and Reproduction
American pikas have adapted to living in very inhospitable environments. They live where most other mammals do not venture to go--the treeless slopes of mountains. It is very cold, rocky and treacherous for the tiny pika.
Pikas help protect themselves by living in colonies. They live near other pikas and will alert the group to predators by sending out a warning call. Weasels, hawks and coyotes can prey on pikas.
Although pikas live in colonies, they are very territorial over their den and surrounding area. They will give off territorial calls to define the boundaries between each pika neighbor. They make their dens among rocks.
Pikas are active in the daytime and they do not hibernate in winter. They are active throughout the year, but they tend to spend most of their time inside the den in the winter. Pikas eat stored grasses to survive and venture out to forage when the weather permits.
In early to mid-spring, American pikas begin to breed. Many pikas breed twice--once in spring and summer. The female is pregnant for a month before giving birth to a litter of 2-6 young. When born, the young cannot function on their own and they depend on their mother for care. It takes about a month for the young to be weaned and 3 months to reach an adult size. After a year, the young develop into breeding adult pikas.
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The habitats of pikas, a small mammal, are limited by various factors like temperature sensitivity, available resources, and environmental conditions. They undergo a concept known as 'range shifts', moving habitats due to changing climate. Their survival can be influenced by the availability of resources, similar to certain butterflies and European bird species.
Explanation:Pikas, small mammals, are influenced by various environmental and survival factors which limit their habitats. These factors include their sensitivity to heat - small animals like pikas lose heat faster than larger ones, influencing their preference for cooler habitats such as mountains. Additionally, pikas are dependent on specific ecosystem conditions and available resources; a concept known in ecology as range shifts, explained by movement of species habitats due to factors like climate change.
For example, similar to certain European bird species and butterflies like the Karner blue butterfly, pikas might shift their range due to environmental changes. Changes in available resources affect pikas as well, as seen in how the distribution of wild lupines influences the Karner blue butterfly population in oak-pine barren habitats.
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A motor that allows a machine to move over the rocky surface of a planet is a(n)..
A)sensor.
B) computer.
C) output device.
D) robot.
A motor that allows a machine to move over a rocky surface of a planet is a robot.
Explanation:The motor that allows a machine to move over a rocky surface of a planet is a robot. A robot is a machine capable of carrying out complex tasks and can be programmed to navigate difficult terrains like rocky surfaces. For example, rovers used by NASA to explore other planets are equipped with motors that enable them to traverse rocky terrains.
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What best describes the temperature of a city located along a windward coast
The answer is : Cooler summer temperatures than an inland location at the same latitude.
-your welcome ;)
A city located along a windward coast usually experiences moderate and stable temperatures. The sea's influence brought by prevailing winds results in cooler summers and milder winters compared to inland cities. This effect is known as maritime influence or coastal moderation.
Explanation:The temperature of a city located along a windward coast is typically more stable and moderate compared to cities situated inland. Windward coasts, those facing the direction from which prevailing winds blow, are greatly impacted by the nearby body of water. Ocean water heats up and cools down more slowly than land does because of its high specific heat, which results in coastal areas having milder temperatures and less temperature variability.
For example, if the prevailing wind is blowing from the sea towards the shore, which is the usual case for windward coasts, it carries with it the influence of the sea temperature. This generally results in cooler summers and milder winters compared to cities that are located inland. This effect is otherwise known as maritime influence or coastal moderation.
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Rising temperatures in the Arctic Ocean can lead to large die-offs of phytoplankton, which are autotrophs. What would most likely happen in an Arctic ecosystem if the phytoplankton population decreased?
Phytoplankton refers to the microscopic marine species that thrive at the bottom of the food chain. They obtain their energy from carbon dioxide via photosynthesis, like plants and thus are very essential in carbon cycling.
Phytoplankton forms the base of almost every ocean food web. Thus, it can be stated that they make the majority of other ocean life possible. They are the source of food for zooplankton and small fishes, as well as for larger animals like jellyfish and whales.
Thus, if the population of phytoplankton gets declined, it will indirectly affect other species in the aquatic ecosystem. It can also be said that with the decrease in the population of phytoplankton, the population of other major species in the ecosystem also gets a decline.
Answer:
The populations of all other organisms in the food web would decrease because there would be less energy available in the ecosystem.
Explanation:
plato answer
this video is about the human blank project
? there is no video. Please be more specific
I suggest taking this post down before a moderator does.
They are pretty strict. :)
1 What is the description of heat flow in the situation above?
2 why is radiation a unique form of thermal energy transfer?
3 which type of heat transfer causes your face to feel warm when you sit in the sun
4 what is shown in the image above?
5 which decreases the thermal energy of a can of soup you just took of your pantry?
1. The answer is; B
This is because the soup has a higher temperature than the surrounding air. The heat will move from hotter object to the cooler object in search of thermal equilibrium. Heat transfer will only stop when the soup and the surrounding air have more or less the same temperatures.
2. The answer is; B
No mas is required because radiation (which are mainly electromagnetic waves) can transfer energy even through a vacuum. Other forms of energy transfer (such as convection and conduction)involve the transfer of vibrational motion from one molecule of matter to the next.
3. The answer is; D
The sun rays (which are electromagnetic waves that travel in photons) travel from the sun and through the vacuum of space before they reach the earth. When the photons hit the molecules that make up your skin, they energize them and cause them to vibrate more energetically. As they, differentially, lose this kinetic energy (when resuming a lower excitation state), this energy is expended as heat which you feel on your face.
4. The answer is; D
To start with, it is important to note that water is not a good conductor of heat. Therefore, as it is heated from below by the Bunsen burner, the water at the bottom of the glass gets warmer that than at the top of the glass. Warm water is less dense than cool water hence begin to rise while the cooler water from the top replaces the rising warm water. This process continues and forms convection currents until the water starts to boil.
5. The answer is; B
When the can is opened, it exposes the soup to the environment. This way the heat from the soup (due to thermal disequilibrium) transfers from the soup to the air. Because the soup is hotter, it loses heat energy to the surrounding as dictated by laws of thermodynamics.
How will the summer drought influence the model we see here?
The summer drought will influence the model badly because the water is used to make food. Water is the basic need of our life. It is used in everything in our lives like electricity production, washing dishes, and many other activities in daily life. We don’t have enough water means drought and this effect disturbs many people in many activities within various nations.
Which experiment would most likely contain experimental bias? A. A company that makes pain relief medication tests the effectiveness of their own medicine compared to that of three other brands. B. A chemistry class performs an experiment in which each reaction has the same amount of starting material and begins at the same temperature. C. A student tests the attraction of bees to flowers by placing four different flowers in the same location and counting how many bees visit each. D. A lab performs a test by giving bacterial colonies the same amount of different antibiotics and growing them under the same conditions.
Hello,
Question - Which experiment would most likely contain experimental bias?
Answer - A. A company that makes pain relief medication tests the effectiveness of their own medicine compared to that of three other brands.
Why - "In epidemiology, reporting bias is defined as "selective revealing or suppression of information" by subjects (for example about past medical history, smoking, sexual experiences)."
A company that makes pain relief medication tests the effectiveness of their own medicine compared to that of three other brands would most likely contain experimental bias.
What do you mean by experimental bias?The term "experimental/experimenter bias" refers to a researcher's influence on the research's outcome. When researchers choose a research topic, they have a predetermined outcome in mind. What is medication?"A medication (also known as a medicament, medicine, pharmaceutical drug, medicinal drug, or simply drug) is a substance that is used to diagnose, treat, or prevent disease."
Here, the company is only testing and have information of its own product and not of others. So, they already have an idea about the outcome.
Hence, the correct option is A. A company that makes pain relief medication tests the effectiveness of their own medicine compared to that of three other brands.
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How gypsy moth being controlled?
Gypsy moth can be contolled through;
Maintaining a clean yardUsing Gypsy moth trapsUsing less toxic botanic insectside such as natural pesticidesUsing a Tanglefoot paste barrier.Florida receives about 54 inches of rainfall a year. What would happen if all this rain were to fall in one day?
a. Condensation
b. Flooding
c. Evaporation
d. Absorption
Help ill give 13 points!!
If the line graph has a broken line between the points, then _____.
the data has not been verified from more than one experiment
the data is not actual data and is only an approximation
the data is valid but is being defined for one of multiple sets of data
the data has only been verified by one other experimenter
the data is not actual data and is only an approximation. I got 100 on a test, your welcome))
If the line graph has a broken line between the points, it means there are missing values or gaps in the data. This does not invalidate the data, but indicates missing information for certain points.
Explanation:If the line graph has a broken line between the points, it means that the data is not continuous and there are missing values or gaps in the data. This usually occurs when the data points are not available for those specific values or there is a break in the data collection process. The broken line does not necessarily mean that the data is not valid or verified, it simply indicates missing information for certain points.
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This picnic table was made from fallen trees in a local forest. Is this picnic table a biotic or abiotic factor? Explain your answer.
Q: this picnic table was made from fallen trees in a local forest. is this picnic table a biotic or abiotic factor? explain your answer.
A: the answer would be biotic because the term biotic means that something is living or had lived before. as you can see, the table was made by fallen trees in the local forest. that means it lived before the tree was fallen and carved into a picnic table.
hope this helps! ❤ from peachimin
The picnic table produced from fallen trees is a biotic factor
Biotic factors are living things which includes plants, animals and organisms present in an ecosystem which also contributes to the existence of the ecosystem. while
Abiotic factors are non-living things/factors found in an ecosystem that has an impact on the existence of an ecosystem and they include ; water, temperature, rocks and soil.
Hence we can conclude that the picnic table is a biotic factor because it is produced from a once living thing.
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A species of frog slowly dies off because it cannot compete with the toads and lizards that share its ecosystem. This is an example of
A species of frog slowly dies off because it cannot compete with the toads and lizards that share its ecosystem is an example of background extinction
What is the function of the cell membrane
A cell membrane protects a cell from it's surroundings. The cell membrane controls the movement of substances from the outside and inside of cells and organelles.
The cell membrane, also known as the plasma membrane, is the outer covering of animal cells which sits inside the cell wall of plant cells. It is semi-permeable so it allows certain materials to go in and out of the cell. Substances that can pass easily in and out of the cells include oxygen, carbon dioxide, and water. So basically, it is separates the cytoplasm from the outside environment, allowing only certain molecules to enter and exit the cell and also controls the amount of the substances that can go in and out.
To test how fertilizer affects tomato plants, a farmer divided a field of young
tomato plants into 10 plots of equal size. The farmer then put fertilizer on half
of the plots and no fertilizer on the other half of the plots. Which factor is
being tested in this experiment?
A. Amount of fertilizer
B. Kind of plants
C. Age of plants
D. Brand of fertilizer
Answer:
Option (A)
Explanation:
In order to conduct an experiment, there are variables (parameters) that are dependent on the experiment. These variables can be either dependent or independent.
Dependent variables are those that cannot be changed throughout the experiment and are dependent on the independent variables.
On the other hand, the independent variables are those whose changes can have an effect on the experiment. These are the parameters that control the experiment.
In the above-given experiment, the amount of fertilizer is a factor that can be tested, as the amount of fertilizer is determined that is required for the entire crop field, containing tomato. It means that the amount of fertilizers needed to put on half of the plot will be again required to put on the remaining half of it.
Hence, the correct answer is option (A).
the physical expression of genes
The physical expression of genes are phenotype. Phenotype is the expression of the gene by the appearnace of the organism. It is the characteristics of that trait.
Examples : When pigment is made in our eyes, height ( tall and short) , weight, blond hair is the phenotype for the blond hair genotype and skin colour( black, white ) is the phenotype trait.
The physical expression of genes is known as phenotype, which refers to the observable characteristics or traits of an organism. This expression is influenced by both an organism's genetic makeup and environmental factors.
Explanation:The physical expression of genes is known as phenotype. Phenotype refers to the observable characteristics or traits of an organism, such as its appearance, behavior, or even susceptibility to certain diseases. It is influenced by the interaction between an organism's genetic makeup (genotype) and environmental factors.
For example, in humans, eye color is a phenotype that is determined by specific genes. Different combinations of genes can result in different eye colors, such as blue, brown, or green. The phenotype can also be influenced by environmental factors, such as exposure to sunlight, which can affect the production of pigments in the eye.
Understanding the relationship between genes and their physical expression is important in fields like genetics, medicine, and evolutionary biology, as it helps us understand how traits are inherited and how they can change over time.
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please I need help pronto
they use them as symbols so dont get it wrong
in a biome, what term refers to the natural supply of water in the form of rain?
I'm pretty sure the answer you are looking for is precipitation. Hope this helps!
Answer:
The correct answer is precipitation.
Explanation:
The term that is used to illustrate the falling of water from the sky because of the condensation of water found in the clouds is precipitation. Precipitation is the natural supply of water that comes in the form of hail, rain, sleet or drizzle.
It is considered as one of the prime sources of the supply of water in the biome. The other kinds of water supply are surface water and ground water.
What biological process allows process allows humans ,mammals,and birds to maintain high body temperatures?
Endotherms and Ectotherms. Humans, along with all other birds and mammals are endotherms, which means that they are animals that actively maintain a stable body temperature by generating heat. People sometimes call endotherms warm-blooded animals
Answer: Endotherms and ectoderms
Explanation:
Mammals like human beings, and many more animals, are endotherms can actively maintain their body temperature by the help of the process known as homeostasis by generating heat.
Such kind of animals are known as endotherms because they can regulate their body temperature.
The reptiles, birds and insects cannot maintain their body temperature so they are known as ectoderms. They are commonly known as cold blooded animals.
Which of these is a common problem after a volcano erupts?
A. Global warming
B. Acid rain
C. Seismic waves
D. Ground shaking
B. Acid rain
When volcanic eruption happens, Sulphur dioxide is released which could cause acid rain.
A. and D. are caused by earthquake thus is not correct
C. Global warming could happen under extreme circumstances but it's not common.
The outputs of cellular respiration are
a.nutrients and carbon dioxide.
b.energy and carbon dioxide.
c.nutrients and oxygen.
d.energy and oxygen.
So you recieve the CO2, Sun Photons, and such, so the plants outcomes are d, energy and nutrents because oxygen comes out from the vasular tissue, and thhe energy comes from the other incomes.
Answer:
its D. Energy and oxygen.
Explanation:
what is the function of the capsule in a prokaryotic cell?
The function of the capsule in a prokaryotic cell is to protect the contents of the cell
what is the difference between the weather and climate
Which type of macromolecule regulates cell processes or transports material into and out of cells?
Answer:
Proteins
Explanation:
Proteins perform several functions such as regulation of cellular processes and transport of materials in and out of the cells.
Some proteins serve as enzymes and catalyze the cellular processes and thereby regulate the rate of the product formation. Proteins such as transcription factors regulate the expression of several genes. Some hormones are proteins or derived proteins. Insulin is an example which in turn regulates the blood glucose levels in the body.
Some of the proteins present in the cell membrane serve as channels and pumps to allow the transport of various substances across the cell membrane.
When you fill a glass at your kitchen sink for a drink, you probably don't think about where the water came from. Perhaps you should, though, because the water you drink affects your health. Consider the small town of Long Pine, Nebraska. Less than a mile from town, Long Pine Creek is fed by a wealth of underground water. When the town was built, the people of Long Pine dug a well near the creek. They installed a pump and piped the water into town. They also built a water tower to keep the water pressure even. 2 Many people who live near an aquifer get their water in this manner. An aquifer is an underground source of water. When people dig down to the level of the aquifer, water from the ground flows into the well. Some aquifers, like the one near Long Pine, are naturally clean and free from harmful chemicals, minerals, and microbes. But many aquifers are not of such good quality. Some are tainted by ammonia or bacteria. Some contain poisonous minerals such as arsenic, and some have too many minerals in them (such as salt or iron) for the water to be fit to drink. 3 Most major cities in the United States get their water from lakes or rivers. Water from lakes, rivers, or contaminated aquifers must be treated. The process is carried out in a treatment plant. Drinking water has to be free of harmful minerals, poisonous chemicals, and disease-causing bacteria. In addition, it must be acid-neutral or slightly alkaline to prevent contamination from metal in the pipes. 4 The city of York, Pennsylvania, gets its water from two artificial lakes, called reservoirs, which are filled by Codorus Creek. The water looks clear, but if you dipped a glass in it, you would see mud, organic particles, and maybe even a minnow or a dead leaf. You wouldn't want to drink it! The water goes through a screen to remove the dead leaves and aquatic animals. Then it goes to a pumping station. At the pumping station, a chemical called potassium permanganate is added to increase the amount of oxygen in the water. Oxygen helps kill germs and improves water's taste. 5 From the pumping station, the water goes to a rapid mixer. Here an ingredient called alum is added to make fine particles clump together. Powdered carbon is also added at this stage. The alum gets rid of cloudiness in the water by causing the tiny particles to settle out when the water is pumped to a settling basin. The carbon, which also settles out, absorbs bad odors and tastes. On its way to the settling basin, the water gets an injection of chlorine. 6 The water stays in the basin while the particles, called "floc," sink to the bottom. Afterward, the almost-clear water passes through a filter with layers of sand, charcoal, and gravel. The filter takes out all but the tiniest pieces. The water is then sent to a clearwell, where ammonium sulfate, lime, and additional sodium hypochlorite are added. Finally, it is pumped into storage tanks until people need to use it. As it flows out to homes, factories, and businesses, caustic soda is added to control the water's acidity. This is an important step; if the water is too acidic, it may react with the metal surface of water pipes and pick up some of the metal. 7 In some coastal areas around the world, including California, desalinization plants are being built. These plants remove the salt from ocean water so that people can drink it. Salt can be removed by distillation or by reverse osmosis (pumping seawater at high pressure against a special membrane). Such plants can produce twenty-five million gallons of drinking water a day, but they are expensive to build and may harm the ocean. 8 Windhoek, the capital city of Namibia, is located between two deserts, so it has a constant water shortage. The city has developed a method so that waste water from the city's sewage-treatment plant can be reused. Advanced treatments remove ammonia and dissolved organic material. The water is purified by adding chlorine and lime. Normally, the reclaimed water irrigates parks and gardens, but during droughts, as much as thirty percent of the clean water pumped into homes comes from reclaimed water. Water shortages can be severe in some areas of the world, so we should continue working to find better methods of conserving and reusing our water supplies. Question 1 Which statement would be included in a summary of the passage? A Many people who live near aquifers get their water from wells. B Water from lakes and rivers may look clean, but it can be full of microbes and minerals. C Ammonium sulfate, lime, and other chemicals are added to drinking water during processing. D Desalinization plants remove salt from ocean water to make it safe for drinking.
y esta biblia no mames xd
Answer:Letter D.
Explanation:
The statement that would be included in a summary of the passage is the one of the letter D. The text clearly states in the end that most coastal cities, including those located in California, have implemented the desalination process to collect ocean water and make it suitable for consumption. Desalination is a process by which salt is removed from sea or ocean water through specialized plants.
List three factors that caused a decrease in the rabbit population?
The density dependent factors are factors whose effects on the size or growth of the population vary with the population density. There are many types of density dependent dependent factors such as; availability of food, predation, disease, and migration. However the main factor is the availability of food.
Decrease in rabbit population can be caused by extreme weather conditions or natural disasters increased predation and decrease in available food resources.
Explanation:There are various factors that can lead to a decrease in the rabbit population. Firstly weather conditions and natural disasters can negatively impact the rabbit population as extreme cold forest fires or floods can lead to mortality regardless of population density. Secondly an increase in predation can lead to a decrease as well. For example if the population of a predator like wolves or coyotes increases it could lead to more rabbits being hunted and thus a decrease in their population. Lastly a decrease in available food resources can also cause the population to decrease as it leads to less successful development and reproduction in rabbits.
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The outer of bone is called the periosteum true or false
the answer is true good luck
Which of the following processes returns carbon from this vast reservoir to the active carbon cycle? ( More than one answer may be right)
A. Burning fossil fuels
B. Sedimentation
C. Photosynthesis
D. Decomposition of dead organisms
A and D are the answers.
Which statement about controlled experiments is true?
A) In a controlled experiment, all variables must be kept the same
B) Controlled experiments cannot be conducted on living things
C) A controlled experiment only tests one variable at a time
D) Scientists always utilize controlled experiments
The answer is
C) A controlled experiment only tests one variable at a time
In a controlled experiment, only one variable at a time is changed while all others are kept constant. This type of experiment can be performed on living things, and while important in scientific research, are not used in every instance.
Explanation:The correct statement about controlled experiments is 'C) A controlled experiment only tests one variable at a time'. In a controlled experiment, the investigator changes one variable while keeping all other variables constant. This approach ensures that any observed changes in the experiment can reliably be attributed to the variable that the investigator intentionally manipulated. Controlled experiments can indeed be performed on living things, and while they're a key tool in the scientific method, it's not accurate to say that scientists always use them because some research questions may not lend themselves to controlled experiments.
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during which stage of the cell cycle is DNA copied
It was during the Mitosis stage or the S-phase (Synthesis) of the Interphase. The cells spend most of their life in Interphase before Mitosis will occur.
DNA replication takes place during the S phase of the cell cycle, resulting in two identical sister chromatids for each chromosome. The centrosome is also duplicated, setting the stage for mitosis and ensuring that each daughter cell gets a full set of chromosomes.
Explanation:DNA replication occurs during the S phase (synthesis phase) of the cell cycle. During interphase, more specifically in the S phase, nuclear DNA is in a semi-condensed chromatin configuration, and this is where the replication of DNA takes place. This process leads to each chromosome being composed of two identical copies known as sister chromatids, which are essential for the following mitosis or cell division stages.
During the S phase, not only is the DNA replicated but also the Centrosome, which consists of a pair of centrioles. These structures are crucial for the formation of the mitotic spindle, the apparatus responsible for the correct segregation and movement of chromosomes during mitosis. This is to ensure that each daughter cell receives a complete set of chromosomes, which is fundamental for proper cell function and division.
Help!!!!!!!!!!!!!!!!!!