Answer:
BIG BANG THEORY. i believe is your answer
Explanation:
It states that the universe is expanding every second. According to the theory the universe is becoming less dense.The big bang theory and the steady state theory are theories about the origin of the universe.
I hope this helps mate :)
Examples of enzymes
Why are there so many variations of human skin color
The variations in human skin color result from genetic adaptations to different environments and UV radiation exposure. They varies due to adaptations to environmental conditions and UV radiation exposure.
Why skin color varies genetically?Skin color is determined by the amount of melanin in the skin which is controlled by multiple genes. This variation in melanin production is an evolutionary response to different levels of UV radiation in various regions of the world.
In areas with intense sunlight such as near the equator, people tend to have darker skin with more melanin to protect against harmful UV rays. In regions with less sunlight, individuals have lighter skin with less melanin to enable the production of vitamin D which is essential in low-light environments.
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As an air mass increases in temperature, its dew point.
O
A. increases
O
B. condenses
O
C. is unchanged
O
D. decreases
As an air mass increases in temperature, its dew point - A. increases.
When the temperature of an air mass increases, its ability to hold water vapor also increases. The dew point is the temperature at which air becomes saturated with moisture and water vapor begins to condense.
As the air temperature rises, more water vapor can be held in the air before it reaches saturation, thus increasing the dew point.
Temperature Increase: As the air mass warms up, its temperature rises.Water Holding Capacity: Warmer air can hold more water vapor. This means the air has to reach a higher temperature before it becomes fully saturated.Dew Point Change: Since the dew point is the temperature at which the air is saturated with moisture, a higher temperature capability means that the dew point also increases.Hence, with an increase in the air mass temperature, the dew point increases as well.
A major change in evolutionary patterns over long periods of time is best described as:
A. Allopatric Speciation
B. Directional Selection
C. Sympatric Speciation
D. Microevolution
E. Macroevolution
Answer:
A major change over long periods of time is best described as macroevolution.
Explanation:
Macroevolution would be referring to evolution on a larger scale where populations speciate etc. A, B and C are various forms of speciation and microevolution would be referring to smaller changes in evolutionary patterns e.g. in adaptive or physical traits which may not be deemed 'significant' enough to be considered a speciation event.
3. When does segregation of homologous chromosomes occur during meiosis?
The segregation of homologous chromosomes occurs during anaphase I of meiosis I, with each daughter cell receiving one chromosome from each homologous pair, forming haploid cells.
Explanation:The segregation of homologous chromosomes occurs during meiosis, specifically in anaphase I of meiosis I. During this stage, the previously aligned chromosomes at the metaphase plate are separated and pulled to opposite poles of the cell. This process ensures that each daughter cell receives one chromosome from each pair of homologous chromosomes, leading to the production of haploid cells. These haploid cells contain a single set of chromosomes, which contributes to genetic diversity when they combine during fertilization. Moreover, the independent assortment of chromosomes during meiosis I contributes to the unique combination of genetic material in the resulting gametes.
During meiosis, the segregation of homologous chromosomes occurs in two stages. The first stage is during anaphase I, when homologous chromosomes, which are paired up as bivalents, separate and move to opposite ends of the cell. The second stage is during metaphase II, when the sister chromatids of each chromosome, resulting from the earlier separation of homologous chromosomes, separate and move to opposite poles of the cell.
12. Identify the sex cell shown at A.
13. Identify the sex cell shown at B.
What interactions occur between individuals of the same species
Answer: an offspring
Explanation:
Select all the correct answers.
The following image is a food web in an aquatic ecosystem. What two possible consequences will an increased population of smaller fish lead
turtles
large fish
small fish
aquatic insects
water fleas
algae
decreased producers
decreased primary consumers
An increased population of smaller fish could lead to decreased populations of primary consumers and producers, and may contribute to biological magnification if toxic substances are present.
Explanation:An increased population of smaller fish in an aquatic ecosystem could have several consequences. One possible effect is decreased primary consumers as the smaller fish may consume more aquatic insects and water fleas, thus reducing their populations. Another effect may be decreased producers, because with more small fish eating algae, the producer population may suffer, potentially affecting the whole food web due to lack of food for primary consumers.
Additionally, if persistent toxic substances are present in the ecosystem, biological magnification could occur, where these toxins accumulate in higher concentrations as they move up the trophic levels from algae to small fish to larger predators such as large fish or turtles.
An increased population of smaller fish in an aquatic ecosystem can lead to two possible consequences: decreased producers and decreased primary consumers.
1. Decreased producers: The increased population of smaller fish can result in higher predation on primary consumers such as aquatic insects and water fleas. This can lead to a decrease in the number of primary consumers, which in turn reduces the consumption of algae, the producers in the food web. As a result, there may be a decrease in the overall population of algae in the ecosystem.
2. Decreased primary consumers: Another consequence of an increased population of smaller fish is a potential decline in the population of primary consumers. This is because the smaller fish may consume more primary consumers, causing a decrease in their numbers.
It is important to note that these consequences are based on the assumption that smaller fish are predators of primary consumers in the food web. However, the specific dynamics of an ecosystem can vary, so these consequences may not always apply.
Complete question :-
Select all the correct answers.
The following image is a food web in an aquatic ecosystem. What two possible consequences will an increased population of smaller fish lead
turtles
large fish
small fish
aquatic insects
water fleas
algae
decreased producers
decreased primary consumers
how do the number of chromosomes in a female scorpions egg cells compare with the number in her body (somatic) cells
Answer:
her egg cells will have half the amount of chromosomes as the somatic cells.
Explanation:
since egg cells are gametes (sex cells), they are formed during the process of meiosis. sex cells will always have half the amount of chromosomes that somatic cells have due to meiosis, unless there is a mutation. therefore, she will have half the amount of chromosomes.
Answer:
**There are half as many chromosomes in egg cells.**
This is because reproductive cells combine with both male and female cells to form a zygote, and if the chromosomes were the same as the parent they would multiply by 2 every generation.
So thats why there are half as many chromosomes in egg cells.
If someone who is homozygous for an autosomal recessive disorder mates with a person who does
NOT carry the mutated gene their child will ________.
Group of answer choices
have a zero percent chance of developing the disease
. have a 25 percent chance of developing the disease
. have a 50 percent chance of developing the disease
have a 100 percent chance of developing the disease
They have a zero percent chance of developing the disease
All the offspring will be carriers of the mutated gene but none of them will show any phenotype associated with the recessive allele. This is because they all will have the dominant allele that will mask the effects of the recessive allele of the gene.
Explanation:
Autosomal means that the allele is not on the X or Y sex chromosomes hence it is not a sex-linked gene. Male and female offspring have equal chances of acquiring the allele of the genes.
Let us assume that the dominant allele is coded by B while that of the recessive is coded by b. The attached Punnet square will show the Mendelian inheritance based on the information from the question.
Therefore, all the offspring will be carriers of the mutated gene but none of them will show any characteristics of the disorder (phenotype) associated with the recessive allele. This is because they will all have the dominant allele that will mask the effects of the recessive allele of the gene.
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Which factor causes Earth's seasons?
A-Earth's distance from the Sun during its orbit
B-the equator's division of Earth into Northern and Southern Hemispheres
C-the tilt of Earth's axis as it orbits around the Sun
D-Earth's completion of its orbit around the Sun every 365,25 days
Answer:
C is the answer you are looking for
Answer:
C) the tilt of Earth’s axis as it orbits around the Sun
Explanation:
The type of soil called loam is made up of
A) nearly equal amounts of silt, sand, and clay
B) mostly clay.
C) sand and gravel.
D) pure humus.
Answer:
The answer is A
Explanation:
Answer: A) nearly equal amounts of silt, sand, and clay
Explanation: Loam soil is made up of silt, sand and clay. It is richer in humus than the sandy soil. It is suitable for growing most varieties of crops as it retains water and has humus for plant growth.
HELP!! In what ways are fats and steroids similar to each other, and in what ways are they different?
Answer:
the answer is the first one!
Explanation:
I did it. do you like food?
Explain how energy flows between abiotic and biotic systems.
25 points.
Explain it in full detail.
Answer:
Biotic factors can be described as the living components of a system. Abiotic factors can be described as the non- living components of an ecosystem. The abiotic and biotic components of an ecosystem are linked to each other by the flow of energy.
Energy usually enters an ecosystem through the abiotic factor, i.e Sun in the form of heat. This energy is essential so that the biotic component, plants, can make their own food. Some of the heat energy is dissipated back into the atmosphere in the form of heat. Rest, the energy is directed to herbivores, carnivores and decomposers. All these organisms also dissipate some of the heat energy back into the atmosphere.
Earth's magnetic field:
a. changes over time
b. remains unchanged
c. does not affect solar winds
d. is not affected by solar winds
changed
Explanation
As it's change it's polarity over time and it's called polarity reversal
Earth's magnetic field changes over time and is affected by, and affects, solar winds. It forms the magnetosphere, deflecting solar winds, but can also be influenced by them during solar storms.
Explanation:Earth's magnetic field is a fascinating topic that resides under the subject matter of Physics
To answer your question,
a.) Earth's magnetic field does indeed change over time .This is well-documented in geological records, with the magnetic poles known to swap places approximately every 200,000 to 300,000 years. Currently, we are significantly overdue for a swap. As per questions c.) and d.), the Earth's magnetic field is affected by solar winds, and it does affect them as well. Our magnetic field deflects a lot of the solar wind, causing it to follow the field lines and form the magnetosphere. But during solar storms, solar wind can influence magnetic field strength and shape.
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6 effects of weeds on crops
Answer:
1. They effect crop productivity
As weeds start to grow in the area where the crops were destined to grow, the production of the crops gets lowered.
2. They deplete the crops from nutrition
The weeds will compete with the crop plants for resources such as minerals from the soil.
3. They will deplete water resources
The weeds will compete with the crop plants for water.
4. Sun-light will be depleted
The weeds will complete with the crop plants for sun light.
5. The crop quality will be affected
As the crop plants will be in competition with the weeds, hence their quality will be affected.
6. They can reduce the biodiversity of crop plants.
Which type of respiration takes place when there is no oxygen present?
O
A. Aerobic
O
O
O
B. Mitochondrial
c. Anaerobic
D. Cellular
Answer:
C. Anaerobic
Explanation:
To produce energy for our muscles and organs, our body needs to breathe in oxygen. It is known as aerobic respiration, takes place in the mitochondria of our cells. But there are cases when our bodies cannot get enough oxygen, like when we're working out very hard or holding our breath.
Our cells then switch to anaerobic respiration. Like a backup plan for producing energy without oxygen. In our cells, anaerobic respiration takes place in the cytoplasm.
There's a catch, though! The amount of energy produced by anaerobic respiration is less than that of aerobic respiration. Also, it produces lactic acid, a waste product that can make our muscles feel fatigued and sore and, if it builds up, can cause painful cramps.
So, while anaerobic respiration is helpful in a pinch, it's not as efficient as aerobic respiration in the long run.
________________________________________________________
How many atoms of each element does potassium nitrate (KNO3) contain?
A. Potassium = 3 atom, Nitrogen = 3 atom, Oxygen = 3 atoms
B. Potassium = 3 atom, Nitrogen = 1 atom, Oxygen = 3 atoms
C. Potassium = 1 atom, Nitrogen = 3 atom, Oxygen = 3 atoms
D. Potassium = 1 atom, Nitrogen = 1 atom, Oxygen = 3 atoms
Answer:
The correct option is D. Potassium = 1 atom, Nitrogen = 1 atom, Oxygen = 3 atoms
Explanation:
Potassium nitrate can be described as a chemical compound which is anionic salt. It has positive K+ ions and negative NO3- ions.
The formula shows that there is only one atom of potassium element.The formula shows that there is one atom of nitrogen element present in potassium nitrate.As we can see, the number 3 is written after O. This shows that there are 3 atoms of oxygen present in the compound potassium nitrate.Answer:
d
Explanation:
The elevation of the basement floor in a building is -14 ft. The elevation of the roof is 36 feet. What is the distance from the basement floor to the roof?
Answer:
50ft
Explanation:
Which is the BEST explanation for how fluid pressure from freshwater helps plants to stand upright?
Answer:
Freshwater is a hypotonic solution, which causes the plant cells to swell because of turgor pressure
Explanation:
Fresh water is hypotonic to plant cells thus the plant cells absorbs water osmotically, the cell's vacuole enlarges, exerts an outward pressure on the cell wall called turgor pressure and becomes turgid, which keeps the plants upright.
The pressure increases as more water is taken into the vacuole which pushes the cytoplasm against the cell wall until the cell wall cannot stretch anymore. When the cell wall is being stretched outside it develops a resistant pressure to stretching that is equal and opposite to turgor pressure called wall pressure.
The graph below shows the population of a species over time.
Population size
Time
a) Label four parts of the graph:
Exponential growth
Maximum growth
Carrying capacity
Growth slowing down
b) Why does growth slow down?
Answer:
picture attached below. Once the population reaches carrying capacity, there are not enough resources to support more population growth, so growth slows down
Explanation:
An S-shaped graph of the sigmoid growth curve is a graph representing the population growth over time. The graph represents the three phases, exponential growth, maximum capacity, and growth slowing down.
The answer can be explained as:
(a)The graph is characterized by the rapid growth of the organisms concerning time, the maximum growth is the point where organisms have used full resources and attained a maximum value.
(b) The growth rate slows down once the organisms become to age and die.
Find the attachment for the labeled parts of the graph.
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Where are most of the species in the world located?
a. desert
b. tundra
c. rainforest
d. pennsylvania
The Rainforest
There are more than 10 million species of plants and animals on earth, and more than half of them reside in our rainforests.
Most species in the world are found in tropical rainforests due to their high biodiversity, stable temperatures, and plentiful rainfall.
Explanation:Most of the species in the world are located in tropical rainforests. These environments are characterized by high biodiversity due to stable temperatures, high rainfall, and a multitude of available niches. In contrast, biomes such as deserts and the tundra have more extreme conditions and tend to have lower biodiversity. Deserts, for instance, have very little rainfall and poorer soil conditions which limit plant growth and subsequently the diversity of animal species. Similarly, the Arctic tundra experiences short growing seasons and is known for extreme cold, which also limits the diversity of species. Conservationists often focus on tropical rainforests when designing ecological preserves to protect the rich diversity of species found there.
What is upwelling?
A. The mixing of two biomes
B. The productivity of an ecosystem
C. When infertile species reproduce
O
D. Water moving up from the benthie zone
Upwelling refers to the process in which deep, cold, nutrient-rich water from the ocean's benthic zone rises to the surface. The correct option is D. Water moving up from the benthic zone.
Upwelling usually occurs along coastlines, where wind patterns and ocean currents interact to push surface water away from the shore. As the surface water moves away, it creates a void that is filled by the upward movement of colder water from below. This cold water brings nutrients to the surface, which promotes the growth of phytoplankton and supports the productivity of marine ecosystems.
Upwelling is vital for sustaining marine life and is known for creating areas of high biological productivity, as it provides nutrients for the growth of primary producers, which in turn support the entire food web.
Therefore, the correct option is D. Water moving up from the benthic zone.
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Which of the following is not an example of organic matter?
A dead animal
Coffee bean shells
Bagged fertilizers
Seaweed
Answer:
Bagged Fertilizers
Explanation:
A dead animal will decompose, along w/ coffee bean shells and seaweed. Fertilizers, which are made of chemicals, can not. Another way to think about it is u can eat anything but the fertilizers :-)
Answer:
bagged fertilizer
Explanation:
The picture represents sulfur trioxide.
Which statement is true for one molecule of sulfur trioxide?
A.
There are three atoms of sulfur and one atom of oxygen.
B.
There are three atoms of sulfur and three atoms of oxygen.
C.
There is one atom of sulfur and one atom of oxygen.
D.
There is one atom of sulfur and three atoms of oxygen.
Answer:
1 sulfure 3 oxygen
Explanation:
tri meaning 3 oxygen
Answer:
D.
There is one atom of sulfur and three atoms of oxygen.
Based on your prior knowledge, make a claim about the factors that cause inherited genetic variations within populations. Also make a claim about the effects of mutations. Write your claim in your notebook.
Answer AND Explanation:
FACTORS THAT CAUSE GENETIC VARIATIONS
Crossing over. At the chiasmata during prophase I of meiosis, breakage may occur and exchange of genetic information may take place. New gene combinations which result in variations.Independent assortment. The arrangement of homologous chromosomes at the equator of the spindle during metaphase of the first meiotic division is random. These homologous chromosomes segregate into different daughter cells which contain different genetic combinations which brings about variationFertilisation permits parental genes to be brought together in different combinations. This is the cause of variations in members of the same family.Mutation is the spontaneous change in the genetic makeup of an organism. These changes may be inherited by the offspring therefore beginning variation.Answer:
Genetic variation is caused by:
mutation
random mating between organisms
random fertilization
crossing over (or recombination) between chromatids of homologous chromosomes during meiosis
Explanation:
Cellular division is an essential part of the cell cycle. When a cell divides it passes genetic information to daughter cells. The amount of genetic
information passed on to daughter cells depends on whether the cell undergoes mitosis or meiosis. Mitosis is the most common form of cell division
All somatic cells undergo mitosis, whereas only germ cells undergo meiosis. Meiosis is very important because it produces gametes (sperm and eggs)
that are required for sexual reproduction Human germ cells have 46 chromosomes (2n = 46) and undergo meiosis to produce four haploid daughter
cells (gametes).
Meiosis is a form of
reproduction and mitosis is a form of
_ reproduction
sexual. sexual
OOO
asexual
asexual
sexual
asexual
sexual
asexual
Meiosis occurs where no physical contact is required for reproduction and mitosis occurs where offspring are produced from the single parent without physical contact with another mate.
There are two types of cell cycles: Meiosis and Mitosis.Meiosis involves in development of gametes. Mitosis is involved in formation of somatic cells. The somatic cells are involved in development of skin cells.
Therefore, meiosis involves no physical contact and mitosis occurs in single celled organisms.
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Cell division, crucial for organism growth and reproduction, occurs as mitosis or meiosis. Mitosis is a form of asexual reproduction producing identical daughter cells, while meiosis, crucial for sexual reproduction, produces haploid gametes. The answer to the question is: Meiosis is sex-based, and mitosis is asexual.
Explanation:Cell division is essential for the growth, repair, and reproduction of organisms. The two primary forms of cell division in eukaryotic organisms are mitosis and meiosis. Mitosis is the process by which a single cell divides to produce two new daughter cells that are genetically identical to each other and to the original parent cell, ensuring the continuation of cellular function and genetic information in somatic (body) cells. This type of division is a form of asexual reproduction, as it does not involve the combination of genetic material from two different parent cells.
On the other hand, meiosis is a more complex form of cell division that occurs only in the germ cells (sperm and egg cells) within the reproductive organs. Meiosis involves two rounds of cell division, resulting in four daughter cells, each with half the number of chromosomes of the parent cell. This reduction in chromosome number is crucial for sexual reproduction, as it allows for the fusion of a sperm and an egg to produce a fertilized egg with the correct number of chromosomes. Therefore, meiosis is pivotal in the production of gametes for sexual reproduction.
In conclusion, the question "Meiosis is a form of … reproduction and mitosis is a form of … reproduction" is correctly answered as: Meiosis is a form of sexual reproduction, and mitosis is a form of asexual reproduction.
Please select the word from the list that best fits the definition
the most common gas in the atmosphere
Explanation:
the most common gas in the atmosphere is nitrogen and oxygen followed by CO2 etc...
Answer:
Nitrogen
Explanation:
Among the countless elements existing in nature, we can highlight some widely used or produced in the industry (which, in turn, are used in other areas). And, among these, nitrogen gas, the component with the greatest amount of oxygen in the atmosphere (it makes up 78% of the atmosphere).
Gaseous nitrogen, which is captured from the atmosphere in the same process as oxygen gas, has a wide application in the chemical, food, electrical and metallurgical industries. N2 is used in large quantities in liquid form, since its gaseous form is used as an inert atmosphere.
Select the correct answer from each drop-down menu. Contrast the electron transport chain in photosynthesis with the one in cellular respiration by identifying sources of the high-energy electrons for each. In photosynthesis, electrons that travel through the electron transport chain in the thylakoid
The electron transport chain in photosynthesis involves the excitation of electrons from chlorophyll and the splitting of water molecules, while in cellular respiration, electrons come from NADH and FADH2. Both processes generate ATP through an electron transport chain and oxidative phosphorylation.
Explanation:The electron transport chain in photosynthesis and cellular respiration have some similarities and differences. In photosynthesis, electrons from chlorophyll molecules are excited by light energy and passed through the electron transport chain in the thylakoid membrane of the chloroplasts. The high-energy electrons come from the splitting of water molecules, and the energy is used to produce ATP and NADPH.
In cellular respiration, electrons from NADH and FADH2, generated in earlier steps of respiration, are passed through the electron transport chain in the inner mitochondrial membrane. The ultimate electron acceptor is oxygen in aerobic respiration or other inorganic molecules in anaerobic respiration. The energy from the electrons is used to generate an electrochemical gradient and produce ATP through oxidative phosphorylation.
In summary, photosynthesis uses light energy to excite electrons from chlorophyll and water molecules, while respiration uses electrons from NADH and FADH2. Both processes involve an electron transport chain to generate an electrochemical gradient and produce ATP.
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Would passive or active immunity protect you from a bacterial infection you have head before?
Answer:
active immunity
Explanation:
Active immunity is the form of acquired immunity in which the body produces its own antibodies against infections. When infectected by a bacterial infection that had happened before, one will not become seriously ill. This is because memory cells are able to recognise the antigens and stimulate the immune system to produce antibodies against the pathogens.