Answer:
true
Explanation:
because i took my test
what does it mean for molecuels to move down the gradient
" Up " or " against " a concentration gradient means from low concentration to high concentration. Moving in this direction requires some sort of en else.
some groups of expert farmers grew potatoes, tobacco, tomatoes, and other plants what is the simple subject
A: some group of expert farmers
B: groups
C: potatoes, tobacco, tomatoes, and other plants
D: plants
Plants would be correct...
I need help with number 38 and 39 if anyone could help.
Answers
38. (b) be smaller in size, (The cell 0.5% salt placed in a hypertonic solution of 1.5% salt)
39. (a) cell A will swell more than cell B
Explanation
The process where water moves across a membrane is called osmosis. Salt solution triggers osmosis by attracting the water and making it to move towards it, across the membrane. If the concentration of the salt inside a cell is the same as that concentration outside the cell, the water level will stay the same and there will be no change in shapes of the cells because they are placed in an isotonic solution. A cell cannot loose or gain water when placed in an isotonic solution.
The movement of water in a cell occurs towards the highest solute concentration. If a cell is in a hypertonic solution (> 5% glucose) solution, the water will move from the lower concentration of solute to the region with the highest solute concentration to maintain equilibrium of osmotic pressure. Cell B that is placed in a 5% glucose will lose more water and its size will be smaller than that of cell A because it would have wilted more than cell A which was placed in a 2% glucose solution.
The correct option of 38 question is B which is be the smaller size.
Explanation:As the cell is suspended in salt solution which is hyper tonic as compared to cell.
And salt ions are also not allowed to enter the cell, so the consequence will be the movement of water from cell to salt solution to make cell equal to salt solution.
So the cell will shrink making cell of smaller size.
Part 2.The correct option of 39 question is option B which is cell B will swell more than cell A.
Explanation:Actually here swelling means the size of cells.At the end the size of cell B will be more than the size of cell A. Because the cell A is placed in less concentrated solution than the cell B. First glucose will diffuse to cell making cell hypotonic and after that water moves in cell by osmosis.Water always move from high concentration to low concentration.As in cell A low amount of glucose and water will move in cell than Cell B.Hence Cell b will swell more than A.Processing the crime scene includes _____. the emergency medical team's arrival the locking of all the doors around the house the law enforcement officer taking command of the scene and setting boundaries so that uninvolved persons cannot come on the scene, thus keeping both people and evidence safe the proper packaging and storing of all evidence
Processing the crime scene includes the law enforcement officer taking command of the scene and setting boundaries to keep both people and evidence safe, as well as the proper packaging and storing of evidence.
Explanation:Processing the crime scene includes the law enforcement officer taking command of the scene and setting boundaries so that uninvolved persons cannot come on the scene, thus keeping both people and evidence safe. It also involves the proper packaging and storing of all evidence. The emergency medical team's arrival and the locking of all the doors around the house are not directly part of the process of processing the crime scene.
Processing a crime scene is a crucial step in criminal investigations, and it involves several important procedures. This includes a law enforcement officer taking control of the scene, establishing boundaries to preserve the integrity of evidence and ensure the safety of individuals involved. Properly packaging and storing evidence is also a critical aspect of this process. This helps maintain the chain of custody, ensuring that evidence is handled and documented in a way that preserves its integrity and admissibility in court. Overall, careful and methodical processing of a crime scene is essential in gathering accurate information and building a strong case for prosecution.
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Crime scene processing involves law enforcement taking command, setting boundaries to prevent evidence tampering, and proper packaging and storing of evidence. Forensic scientists and forensic anthropologists aid in analyzing biological evidence and processing DNA.
Explanation:
Processing a crime scene includes significant steps such as law enforcement taking command of the scene, setting boundaries to ensure uninvolved persons cannot tamper with the evidence, and keeping both people and evidence safe. It also includes the proper packaging and storing of all evidence. Specific professionals, such as forensic scientists and forensic anthropologists, play key roles at this stage, analyzing different types of biological evidence left at the scene such as blood, hair, and other body fluids, and also processing DNA. This thorough process is crucial to ensure evidences remain untampered and can be presented accurately in a court of law.
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Marla dabs a small dot of red lipstick on 20-month-old lia’s nose. when put in front of a mirror, lia touches her nose, indicating the development of
Answer:
Leah is indicating the development of self-awareness.
Explanation:
In 1972 Beulah Amsterdam of the University of North Carolina published a study that toppled decades of research and kicked off self-awareness. The study procedure was simple: 88 babies aged 6 to 24 months were placed in front of a mirror, all of them had a small red spot on their noses. Then the mothers would point to the baby's reflection in the mirror and ask who the mirror was. The researchers watched the babies' behavior during the tests.
Only babies ages 20-24 could recognize themselves in the mirror. These babies pointed to the red spot on their own noses. This strongly suggests that they recognized the image as their own, became aware of self, so much so that they pointed to the roaring stain on their own noses.
Accordingly, we can see that when Lia touches the red spot on her nose she is demonstrating that developing self-awareness.
Which of these is LEAST LIKELY to cause the extinction of organisms?
A) hunting animals for food
B) clearing land for agriculture
C) migrating from one region to another
D) new plant species competing with native plants
Final answer:
Migration is the least likely to cause extinction as it is a natural behavior, unlike overharvesting, habitat destruction, and competition with invasive species, which are significant drivers of biodiversity loss.
Explanation:
The option LEAST LIKELY to cause the extinction of organisms among the ones provided would be C) migrating from one region to another. This is because migration is a natural process that most organisms undertake in response to seasonal changes or to fulfill their lifecycle requirements. While individual organisms might face risks during migration, as a process it generally does not lead to species extinction.
In contrast, hunting animals for food (A), clearing land for agriculture (B), and new plant species competing with native plants (D) can contribute significantly to species endangerment and possible extinction. Overharvesting through hunting can deplete populations beyond recovery, habitat loss from land clearing can remove the home environment necessary for species survival, and invasive species can outcompete native species, leading to a decline in biodiversity. These factors are often interconnected with major causes of biodiversity loss, such as habitat loss, climate change, invasive species, and overharvesting.
How can the practice of tillage be harmful to the overall environment? a. It can impact waterways through sedimentation and pollution. b. It is harmful to the soil that is tilled. c. Tillage decreases overall crop productivity. d. All of the above
My answer to this question is A. It can impact waterways through sedimentation and pollution. It makes more sense. Also I took a test on this.
The practice of tillage can be harmful to the overall environment as it can impact the waterways through sedimentation and pollution. Thus, the correct option is A.
What is Tillage?Tillage is the agricultural preparation of the soil through mechanical agitation of various types of practices, such as digging, stirring, and overturning. Examples of human-powered tilling methods using the hand tools which include shoveling, picking, mattock work, hoeing, and raking.
Depending upon the purpose or the necessity required, different types of tillage are carried out in the environment. These are deep ploughing, subsoiling and year-round tillage. The practice of tillage can be harmful to the environment as it can impact the waterways through the sedimentation and pollution.
Therefore, the correct option is A.
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Many types of plants rely on bees for pollination. Which of the following describes the role that bees play in pollination? A. pollen cleaning B. pollen production C. pollen replication D. pollen transfer
Answer:
D
Explanation:
It is pollen transfer
Put these processes of the water cycle in the correct order, starting from the moment the sun transfers its energy.
Precipitation of water
Evaporation of water
Formation of clouds
Collection of water
1.Evaporation of water
2.Formation of clouds
3.Precipitation of water
4.Collection of water
Explanation
The water cycle starts the moment the sun heats the water collected on water bodies such as lakes and oceans to cause evaporation.The evaporating water rises to reach high atmospheric levels where it cools and condenses to form clouds.The clouds further become heavy to result into precipitation in form of rain.Rain water is collected in the various depressions on the ground and the cycle starts again.
The correct order of the water cycle is as follows:
Explanation:
The Water Cycle is described in the following order:
1) Evaporation of Water
2) Formation of Clouds
3) Precipitation of Water
4) Collection of water
Water cycle is the process of converting water into vapors and then again converting it into water.
When the temperature on Earth rises, the water in the oceans, rivers, seas, etc, evaporate. This is evaporated water rise above the atmosphere through a process called water Evaporation, and due to low temperatures in the atmosphere, the water vapors condense and falls back to the earth in the form of rain through a process called Precipitation. Then this water is again collected by seas, rives, oceans, etc.
This is called the Water Cycle.
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A gas can be squeezed into a smaller container, but a liquid cannot. What does this suggest about the arrangement of particles in liquids and gases?
Gas is compressible while liquid and solids are not. Gas particles are free to go wherever they please. The gas particles are not compacted together very tightly whereas solid particles are compacted very tightly. Liquid particles are not super compacted but they’re still not able to move as freely as gas particles. Hope that helps
Answer:
Use the particle model of matter to explain why you can compress a gas easily, but you cannot compress a liquid very easily. The particles in a gas have very large spaces between them, so the particles can be 'squashed' closer together, meaning the gas can easily be compressed to take up a smaller volume.
Explanation:
03]The water in a location is tested regularly to identify contaminants. The nitrate levels in the water from 1994 to 1997 are shown in the table below. Years Nitrate level in water (in mg/L) 1994 8.5 1995 12.2 1996 9.7 1997 7.3 Which of these conclusions is most likely correct about the people in the location?
Answer:
Although the question is incomplete, missing options are
In 1997, they reduced their water consumption. In 1996, they planted more trees to curb water pollution. In 1994, they used only bottled water for drinking purpose. In 1995, they complained about foul odor and taste in water.Correct option: In 1996, they planted more trees to curb water pollution.
Explanation:
Among given options, a clear trend of nitrate level can be seen. Initially, the nitrate level increased in water in first two years (1994 and 1995) and then it decreased significantly.
From the conditions given in the question, the most probable answer is B the plantation effect (phytoremediation). During phytoremediation, plants take up nutrients including nitrate from the water via roots. This nitrogen is then used for the growth and development of plant body mass (e.g. amino acids). As more plants were growing in later years, higher reduction of nitrate was seen. Resultantly, in 1997, the concentration of nitrate was dropped to 7.3 mg/L.
The other options are not correct due to following reasons.
A. There is no information on water consumption in the question
C. There is no information on people's behavior on drinking water lifestyle.
D. Nitrate in the water cannot be smelled or tasted.
The nitrate levels from 1994 to 1997 indicate a possible health risk in 1995 when they exceeded 10 mg/L, associated with "blue baby syndrome." The data suggest varying health risks and the importance of water quality monitoring to ensure safety.
Explanation:The nitrate levels in water from 1994 to 1997 suggest that in 1995, the concentrations exceeded 10 mg/L, which is above the level that can cause health issues such as "blue baby syndrome" (acquired methemoglobinemia). In the European Union, drinking water quality standards require nitrate levels to be less than 50 mg/L, so even the highest recorded level (12.2 mg/L in 1995) was within EU standards but could still pose a risk to infants. Elevated nitrate levels can originate from sources like sewage sludge disposal, on-site sanitation, and agricultural activities.
Furthermore, nitrate contamination is a common issue globally, and high levels of nitrates are especially problematic in some low-income countries. As nitrate does not degrade easily in high oxygen conditions, it can persist in groundwater, affecting water quality over the long term. Clean-up efforts in various locations have shown varied success, with contamination remaining a significant issue in some places, such as with Cr(VI) in the water supply of certain US cities.
Given the data presented, it's likely that people living in this location may have experienced periods of increased health risks due to high nitrate levels, especially in 1995. The varying levels over these years could suggest changes or interventions in local practices or environmental conditions that impacted nitrate concentrations in the water supply. Continuous monitoring and adequate filtration are crucial to ensure the quality and safety of drinking water.
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bronchoconstriction is treated by inhaled
A. Histamine antagonists
B. Opiates
C. Pentobarbitals
D. Cholinergic antagonists
D. Cholinergic antagonists
If this propane tank is opened inside a house, the atoms in the tank immediately spread throughout the whole house. Propane is most likely a solid. liquid. gas. plasma.
The right option is; gas
Propane is most likely a gas.
Propane gas is a flammable hydrocarbon, and one of the liquefied petroleum gases. Propane is produced from petroleum refining and natural gas processing. Propane gas can be liquefied at very low pressures. Propane is commonly used as fuel in cooking, heating, and also for aerosol propellants, refrigerants, and in motor vehicles.
Propane is a gas that is often used for heating and cooking, and it is stored as a liquid under pressure.
If a propane tank is opened inside a house, the atoms from the tank will quickly spread throughout the house. This behavior is characteristic of a gas, which is one of the states of matter. Propane, with its molecular formula C3H8, is indeed commonly used as a gaseous fuel. At room temperature and under moderate pressure, propane is typically stored as a liquid in tanks, but when it is released, it becomes a gas. This change occurs because propane, while it liquefies under pressure, will vaporize and expand to fill the available space once the pressure is removed and the propane is exposed to normal atmospheric conditions.
Propane is an efficient energy source and is used in situations where natural gas pipelines are not available. It is also known for its use in barbecue grills and various heating applications. Propane's ability to be compressed into a liquid form greatly facilitates its storage and transportation. When released, it expands and is used as a gas.
The skeletal part of the musculoskeletal system:
A. produces facial expressions.
B. helps the body to create heat.
C. protects the organs of the body.
D. eliminates wastes from the body.
Answer:
protects body organs and support
Julian designs an experiment to see how well different liquids lubricate wooden surfaces. He sets up a number of identical wooden ramps and prepares to slide identical wooden blocks down them. He will time how long it takes each block to reach the end of the ramp. He covers one ramp with water, the second with motor oil, and the third with corn syrup.
What can Julian use as a control group for the experiment?
A.
a ramp with no liquid on it
B.
a second set of ramps covered with water, oil, and syrup respectively
C.
a ramp with no friction on its surface
D.
a block that drops straight down instead of sliding down a ramp
its A. A ramp with no liquid
Answer:
The answer is A. "A ramp with no liquid on it."
Explanation:
He needs a control group to make sure that he proof is valid.
Parrotfish are herbivores that are found in coral reefs. To escape predation, a parrotfish will graze with a rabbitfish, which has venomous spines at the end of its pelvic fins. The rabbitfish does not benefit from this relationship. Which type of relationship do the parrotfish and the rabbitfish have in the coral reef AParasitism B Predation C Mutualism D Commensalismon
Commensal/commensalism is the correct answer.
The first accurate measurement of the size of Earth was made by _____.
The answer would be Eratosthenes
In 240 B.C., a soon to be famous Greek astronomer Eratosthenes made the first good measurement of the size of Earth.
What factors that influence mass movement of particles
Mass movement, which is sometimes called waste movement or slope movement, is defined as the large movement of rock, soil and debris downward due to the force of gravity.
Factors affecting mass movement1. Slope
- Gravity provides the energy to move the materials.
- Rapid movements (e.g. landslide, slumping) etc.
2. Water
- Rainwater acts as a lubricant to weathered materials.
- Rainwater adds weight to weathered materials.
3. Rock structure
- Joints dipping downslope usually assists landslides, rockfalls, rockslide etc
4. Vegetation
- Lack of vegetation cover to hold the loose particles.
5. Vibrations
- Earthquakes.
- Construction processes and mining operations.
If the mass of a material is 49 grams and the volume of the material is 9 cm^3, what would the density of the material be? I need the answer as well as the unit
The density is the quotient between the mass of a material and the volume occupied by it, The density can be expressed for a substance or for a mixture of substances. For example, water density in ambient conditions is equal to 1.00 g/cm3, which means that in 1 cm³ or 1 mL, there are 1.0 g of water. Therefore:
D = m / V
D = 49 g / 9 cm³
D = 5.444 g/cm³
As part of an experiment, a student burns propane (C3H8) to produce carbon dioxide (CO2) and water (H2O). She remembers that she must follow the Law of Conservation of Matter when writing a balance chemical equation. Which of these equations adheres to the Law of Conservation of Matter?
A) C3H8 + O2 -> CO2 + H2O
B) C3H8 + O2 -> 3CO2 + H2O
C) C3H8 + 3O2 -> CO2 + 4H2O
D) C3H8 + 5O2 -> 3CO2 + 4H2O
The correct answer is: D) C3H8 + 5O2 -> 3CO2 + 4H2O
The law of conservation of mass (matter) states that the mass of the system must remain constant over time. So, the mass of the chemical components before the reaction must be equal to the mass of the components after the reaction, according to this law.
3 C,8 H, 10 O
the answer is D) C3H8 + 5O2 -> 3CO2 + 4H2O
Corpus delicti evidence at the Willow Lane crime scene is _____. the neighbors soiled trousers, evidently spattered with blood the scattered papers along the pathway through the hedge the bleeding victim exhibiting knife wounds in his back the 911 call reporting screams and a bleeding victim in the driveway
Catergorize the particles according to weather they are found in the nucleus or the eclectic cloud
Nucleus: Protons and Neutrons
Electron Cloud: Electrons
ExplanationAn atom consists of three subatomic particles i.e Electrons, Protons and neutrons. Protons and neutrons are found inside of the nucleus of an atom whereas electrons are found in the orbits that surround the nucleus of an atom known as electron cloud. In the atom Protons contain positive charge to attract the electrons which contain negative charge and the neutrons contain no electrical charge.
nucleus-
positively charge particles
neutral particles
electron cloud-
negatively charged particles
just finished assignment hope this helps
Need help 1-3
1. The mass of the container holding this table is 3G. What is the mass of the table salt?
2. What is the mass if the combined mass of the table salt and the container is 124g and the mass of the container is 9g?
3. A gram is equal to 1,000 milligrams. If a sample has a mass of 52 grams, what is its mass in milligrams?
9G IS IT AND THATS IT ALL GOT IT
Final answer:
The mass of the table salt is found by subtracting the mass of the container from the total mass. For example, 124g (total) - 9g (container) equals a salt mass of 115g. To convert grams to milligrams, multiply by 1000; hence 52 grams equals 52000 milligrams.
Explanation:
Understanding Mass Measurements
To answer the questions regarding mass measurements and conversions:
The mass of the table salt can be determined by subtracting the mass of the container from the total mass. If the total mass mentioned is 3G (assuming G stands for grams), but normally a container weight is provided along with the total weight, this value might be a typo. The correct calculation would be the total mass minus the container's mass.The mass of the table salt when the combined mass of the salt and container is 124g and the container alone is 9g can be found by subtracting the mass of the container from the total mass, which would be 124g - 9g = 115g.To convert grams to milligrams, multiply the mass in grams by 1000. Therefore, a sample with a mass of 52 grams would be 52 grams * 1000 mg/g = 52000 milligrams.Which hormone from the choices below is most likely responsible for eric's feelings of fatigue, weakness and depression, when at low levels?
a. fsh
b. tsh
c. acth
d. lh
e. gh?
the answer is B. TSH
Answer:
B. TSH
Explanation:
Thyro-stimulating hormone (TSH) is produced by the pituitary gland and its purpose is to stimulate the thyroid to produce T3 and T4 hormones. When TSH values are at low concentrations, T3 and T4 are present at high blood concentrations, the result is that the individual may experience agitation, heart palpitation, insomnia, weight loss, nervousness, tremors, decreased muscle mass, fatigue, weakness and even depression.
In an experiment, Dr. Travis examined the effects of calcium intake on osteoporosis, a condition that causes an increased risk of bone fractures. The amount of calcium is_______ variable. The risk of bone fractures_________ .
1. A reliable
an independent
a dependent
2.can be changed by the participants
can be changed by the researcher
could change with calcium
Osteoporosis refers to an ailment characterized by reduced bone mass and loss of bony tissue that may lead to weak and fragile bones. In an experiment, Dr. Travis tested the influences of the consumption of calcium on osteoporosis, the condition that results in enhanced chances of bone fractures.
In the given experiment, the amount of calcium is the independent variable, and the risk of bone fractures could get changed with the amount of calcium consumption.
The amount of calcium is independent variable.
Explanation:An independent variable is a variable in an experiment which is changed to see its effects on dependent variable.
In this experiment, to know about the causes of osteoporosis, the Ca level in blood or calcium intake in changed.
So the concentration of calcium will be independent variable.
Part 2.The risk of bone fractures is could be changed with calcium.
Explanation:In this experiment osteoporosis or risk of bone fracture is dependent variable.Dependent variable are results of experiment which can be changed by independent variable.As in experiment, Calcium concentration is independent variable.So the risk of osteoporosis depends can change with calcium.Which factors caused the rapid decline or decrease of the Sierra Nevada yellow-legged frog population? Check all that apply. fish fungus pesticides UV radiation pollution
Answer:
A. Fish
B. Fungus
Explanation:
Just did it on edge
Fish and Fungi caused the rapid decline or decrease of the Sierra Nevada yellow-legged frog population. So the correct options are A and B.
What are environmental factors?A population is a measurement of the total number of people in a region, and it can take many different forms. They depict groupings of people that could be very big or very little in size, dispersed or close together, and composed of a wide range of people or people who are highly similar.
We may talk about the population of humans in Chicago, for instance, but we might also talk about the human worldwide population. Despite being two completely distinct groupings, both are populations! The distribution of a population is the region across which it exists, and the abundance of that population is the number of persons in that area.
However, all populations are prone to many environmental variables and factors that have an impact on how they develop and survive, regardless of their size, shape, or diversity.
Therefore the correct options are A and B.
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In performing any laboratory experiment, what is the first step performed out of the following choices? A) collect data B) analyze data C) publish results D) form hypothesis
I think is b but I don’t no
Imagine that two test tubes are set up with 5 mls of starch in both and 500 amylase enzyme molecules added to one tube while 1,000 amylase enzyme molecules were added to the other. Would you expect them to finish digesting at the same time? If not, which one would complete the digestion first and why?
The test tube with 1,000 amylase enzyme molecules is expected to complete the digestion of starch faster.
Explanation:Digestion of starch starts in the mouth, where amylase breaks the starch chains into shorter pieces such as maltose. There are more amylase enzyme molecules in the test tube with 1,000 amylase molecules compared to the one with 500 amylase molecules. Therefore, you would expect the test tube with 1,000 amylase enzyme molecules to complete the digestion of starch faster than the other tube. This is because the higher concentration of amylase enzymes allows for more efficient and faster breakdown of starch molecules into sugars.
There are many ways in which organisms in which and ecosystem interact. two of these relationships are parasitism and predation, in what way is parasitism similar predation?
Parasitism is the relationship between two species where one organism (the parasite) benefits from another organism (by living in it and) causing harm to the host parasite.
While predation is an interaction between two organisms (predator and prey) where the predator eats a prey or a part of its body.
Considering these two relationships, we can say that both of them grow at the expense of the host or prey. Therefore, both of the predator and parasite are dependent on prey or host for their survival.
Parasitism and predation are similar in way that in both process only one partner gets benefited while other gets harm.
Explanation:Parasitism is a relationship between species, where one organism, the parasite, lives on or in another organism, the host, causing it some harm.
The preying of one animal on others.
In both case second party always get harm.
Which of the following is a downside of solar energy?
A. It requires areas with good sun exposure.
B. It is a renewable resource.
C. It is abundantly available.
D. It has reduced greenhouse gas emissions
A. It requires areas with good sun exposure.
Answer:
A. It requires areas with good sun exposure.
Explanation:
For it to work, you need a lot of sun exposure.