Answers
Answer:
population density
Explanation:
i got it right on usa test prep
Related Questions
The brain generally stores new information in its own different and unique netowrk but retrieves information by chunking it with information in netowkrs that contain similar characteristics or associations.
a. True
b. False
Answers
Study the image. A house on a beach near the ocean. Point 1 is over the house, arrow is pointing up. Point 2 is over the ocean, with arrows pointing away from the land. Point 3 is over the ocean with the arrow pointing down. Point 4 is in the ocean with arrows pointing toward land. What do the arrows at point 3 indicate? Cool air is above water. Warm air is above land. Warm air is cooling quickly. Cool air is warming quickly.
Answers
Answer:
Warm air is cooling quickly.
Explanation:
Hot air rises and cool air sinks.
Answer:
c im taking the test right now soooooooooooo hope this helped bye
Explanation:
If a person circulatory system does not function well how might thermoregulation in his or her body be affected
Answers
Parts of skin involved in thermoregulation are the sweat glands,as temperature increases sweat glands are stimulated to release sweat. As the water in sweat evaporates,it absorbs heat from the body ( latent heat of vaporization) through radiation and convectional current. When the body temperature decreases, the blood vessels in the skin constricts( vasoconstriction). This reduces blood flow to the skin hence less heat is lost to the internal environment.
Metabolic activities of the liver and muscles increase to raise heat production when the body temperature is low
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A research group studied various abiotic factors and their effects on the overall productivity of a selected set of lake ecosystems. Productivity is the rate of biomass synthesis in a lake ecosystem. #1 The researchers collected data from 12 lake ecosystems. They measured the total phosphorus content in each system as well as the fish productivity (rate of fish biomass synthesis) in each system. The data are plotted in the graph shown.
Identify the relationship between phosphorus content and fish productivity as shown in the graph above. Explain this relationship.
#2 The researchers also analyzed the amount of light irradiating each lake ecosystem. They plotted these values against fish productivity values to produce the graph for this is the annual light irradiance (mol/m2/year)
identify the relationship between amount of irradiance and lake productivity as shown in the graph. elxplain this relationship.
3# Nutrients are a critical component of any ecosystem. Ecologists have worked under a model that assumed that nutrient availbility is limiting factor within an ecosystem, as its presence or absence can limit the productivity. Explain two factors that affect the validty of this model based upon the data from this study. Explain one possible refinement of thr model that may need to be made.
Answers
#1 The relationship between phosphorus content and fish productivity in the graph above is a positive correlation. #2 a positive correlation #3 nutrient availability is a limiting factor within an ecosystem.
Describe Ecosystem?An ecosystem is a community of living organisms, along with their non-living environment, functioning together as a system. It includes all living organisms (plants, animals, microorganisms) in a particular area and the physical components (soil, air, water, sunlight) that interact with them. Ecosystems can be as small as a pond or as large as a biome such as a rainforest.
#1 The relationship between phosphorus content and fish productivity in the graph above is a positive correlation. As the phosphorus content in the lake ecosystem increases, the fish productivity also increases. This relationship can be explained by the fact that phosphorus is an essential nutrient for the growth of aquatic plants, which are the primary producers in lake ecosystems. More phosphorus content means more availability of nutrients for the aquatic plants, leading to increased primary productivity, which in turn results in more fish biomass.
#2 The graph shows a positive correlation between light irradiance and fish productivity. As the amount of annual light irradiance increases, the fish productivity also increases. This relationship can be explained by the fact that light is necessary for photosynthesis, which is the process by which primary producers in lake ecosystems convert light energy into chemical energy. More light means more availability of energy for primary producers, which leads to increased primary productivity, and in turn results in more fish biomass.
#3 Two factors that affect the validity of the model that assumes nutrient availability is a limiting factor within an ecosystem based upon the data from this study are:
Other factors, such as light irradiance, temperature, and pH can also limit productivity in lake ecosystems. The positive correlation between fish productivity and both phosphorus content and light irradiance indicates that these two factors are significant contributors to productivity. Therefore, the model that assumes nutrient availability is the only limiting factor may not be accurate.
The relationship between phosphorus content and fish productivity is not linear, indicating that there may be a threshold beyond which the increase in productivity plateaus. This suggests that the availability of other nutrients, such as nitrogen or carbon, may also limit productivity.
One possible refinement of the model may be to incorporate the effects of multiple factors, such as nutrient availability, light irradiance, and temperature, on productivity, rather than assuming that one factor is the only limiting factor. This would provide a more comprehensive understanding of the factors that affect productivity in lake ecosystems.
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A botanist wants to see how different colored light waves influence the growth of pea the length of the experiment. One pot is placed into a dark windowless closet. Another plants. She puts the same number of seeds into three identical pots with the same kind and amount of soil. She then gives them the same amount of water every three days for pot is left on the windowsill, and the third is placed under a lamp with a green bulb. write the procedure in the passive voice
Answers
The effect of different coloured light waves on the growth of pea plants was to be observed by a botanist. The same number of seeds were put in three plants with the same type of pots and the same type of soil and every day, they were given the same amount of water. If one pot is placed in a dark windowless closet, the second is placed on the windowsill and the third is placed under a lamp with a green bulb. The variable factor, in this case, will be the colour of light.
Why is light important for plants?Plants require light for the process of photosynthesis. In the process of photosynthesis, the light is trapped by the chlorophyll pigment present in the mesophyll cells of the leaves of the plants.
The light energy is trapped and converted into chemical energy. This is then used for the hydrolysis of water and the reduction of carbon dioxide. These processes then result in the formation of glucose.
Therefore, the plant that gets abundant sunlight on the windowsill will grow better than the plant placed under a lamp and the plant placed under the lamp will grow better than the pot placed in a dark closet.
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3. Which organs are responsible for
protecting the body? How?
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Answer:
Primary lymphoid organs: These organs include the bone marrow and the thymus. They create special immune system cells called lymphocytes. Secondary lymphoid organs: These organs include the lymph nodes, the spleen, the tonsils and certain tissue in various mucous membrane layers in the body (for instance in the bowel)
Explanation:
hope this helps
The thymus is located behind the breastbone above the heart. This gland-like organ reaches full maturity only in children, and is then slowly transformed to fatty tissue. Special types of immune system cells called thymus cell lymphocytes (T cells) mature in the thymus. Among other tasks, these cells coordinate the processes of the innate and adaptive immune systems. T cells move through the body and constantly monitor the surfaces of all cells for changes.
Lymph nodes are small bean-shaped tissues found along the lymphatic vessels. The lymph nodes act as filters. Various immune system cells trap germs in the lymph nodes and activate the creation of special antibodies in the blood. Swollen or painful lymph nodes are a sign that the immune system is active, for example to fight an infection.
The bowel plays a central role in defending the body against germs: More than half of all the body's cells that produce antibodies are found in the bowel wall, especially in the last part of the small bowel and in the appendix. These cells detect foreign substances, and then mark and destroy them. They also save information about the substances in order to be able to react more quickly the next time. The large bowel also contains harmless bacteria called gastrointestinal or gut flora. Healthy gut flora make it difficult for germs to spread and enter the body.
Mucous membranes support the immune system in other parts of the body, too, such as the respiratory and urinary tracts, and the lining of the vagina. The immune system cells are directly beneath the mucous membranes, where they prevent bacteria and viruses from attaching.
The tonsils are also part of the immune system. Because of their location at the throat and palate, they can stop germs entering the body through the mouth or the nose. The tonsils also contain a lot of white blood cells, which are responsible for killing germs. There are different types of tonsils: palatine tonsils, adenoids and the lingual tonsil. All of these tonsillar structures together are sometimes called Waldeyer's ring since they form a ring around the opening to the throat from the mouth and nose.
There is also lymphatic tissue on the side of the throat, which can perform the functions of the palatine tonsils if they are removed.
The spleen is located in the left upper abdomen, beneath the diaphragm, and is responsible for different kinds of jobs:
It stores various immune system cells. When needed, they move through the blood to other organs. Scavenger cells (phagocytes) in the spleen act as a filter for germs that get into the bloodstream.
It breaks down red blood cells (erythrocytes).
It stores and breaks down platelets (thrombocytes), which are responsible for the clotting of blood, among other things.
There is always a lot of blood flowing through the spleen tissue. At the same time this tissue is very soft. In the event of severe injury, for example in an accident, the spleen may rupture easily. Surgery is then usually necessary because otherwise there is a danger of bleeding to death. If the spleen needs to be removed completely, other immune system organs can carry out its roles.
Thoughts on the 7 theories of the origin of life
Answers
Answer:
It started with an electric spark. Molecules of life met on clay. Life began at deep-sea vents. Life had a chilly start. The answer lies in understanding DNA formation. Life had simple beginnings. Life was brought here from elsewhere in space.Explanation:
Which whale traits evolved much later
Answers
Answer:
Which whale traits evolved much later?
Nostrils shifted back toward top of skull; hind legs reduced, then eliminated; forelimbs become paddle like; strong swimming tail with flukes form.
What is the definition of Limiting Factor in your own words?
Answers
Answer:
Something that limits or prevents a population from expanding
Explanation:
I hope i helped
What can insects do that no other arthropods can do
Answers
Answer:
thorax and abdomen, three pairs of legs, antennae
Explanation:
If the specimen is living, then cells Fill in the blank text field 1
Type here
be present when the specimen is viewed through a microscope.
Answers
Answer:
can you please rewrite that so it can make more sense
Explanation:
URGENT
A steroid hormone approaches its target cell. Which will happen first?
The hormone will enter the nucleus
The hormone will combine with proteins to form lipoproteins
The hormone and its receptor will interact with the DNA
The hormone and its receptor will enter the cell’s nucleus
Answers
A steroid hormone approaches its target cell, therefore the hormone will enter the nucleus and is what will happen first which is therefore denoted as option A.
What is a Hormone?This is referred to as a chemical messenger which is released directly into the bloodstream and is responsible for the control of certain metabolic reactions occurring in the cell and an example is steroid hormone such as androgens.
In a situation whereby a steroid hormone approaches its target cell, it first passes through the plasma membrane before it then becomes adhered to the receptors which are present in the nucleus or cytoplasm.
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Which term is an example of force?
A. energy
B. mass
C. weight
D. Work.
Answers
Answer:
c.Weight is an example of force.
What is feedback in a system?A. the regulation of a system by the outputB. the behaviors of the different components of a systemC. the balance of competing factors in a systemD. the definition of what is part of the system and what isn't
Answers
The correct option is A, feedback is the control of a biological reaction by the end products of that reaction. One example is regulation of body temperature: if temperature exeeds 37°C, a signal is sent to temperature regulatory center in brain so the glands begin to sweat, that makes temperature lower. This is an example of negative feedback.
Give two examples of how homeostasis helps regulate the human body.
Answers
Answer:
Here are two examples of how homeostasis regulates different aspects of the body: Get homework help from firstgradeessays[at]gm ail. c om. Quality is a priority.
Body Temperature Regulation: The human body has a set temperature range (around 36-37 degrees Celsius or 98-99 degrees Fahrenheit) that needs to be maintained for optimal functioning. When the body temperature rises due to exercise or external heat, homeostatic mechanisms helps to cool the body. These mechanisms include sweating, which helps dissipate heat through evaporation. Dilation of blood vessels near the skin surface facilitates heat loss. Conversely, if body temperature drops, homeostatic responses like shivering and constriction of blood vessels occur to generate heat and conserve warmth.
Blood Glucose Regulation: Maintaining blood glucose levels within a narrow range is crucial for proper physiological functioning. After a meal, blood glucose levels increase, triggering the release of insulin from the pancreas. Insulin helps facilitate the uptake of glucose by cells, reducing blood glucose levels back to normal. On the other hand, when blood glucose levels drop (e.g., during fasting or exercise), the pancreas releases glucagon, which stimulates the liver to release stored glucose into the bloodstream. This process raises the blood glucose levels and restores homeostasis.
Explanation:
What is definite growth
Answers
What do B cells do?
O make your mucous membranes watery
O produce antibodies
O cause inflammation
o eat dead cells
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61. To effectively activate the glutes and posterior chain during lower-body exercises, the feet must be
Answers
To effectively activate the glutes and posterior chain during lower-body exercises, the feet must be properly positioned and grounded, typically maintaining a stable and balanced stance with the weight evenly distributed across the foot or engaging the heels for maximum engagement.
First, ensuring that the feet are grounded and evenly distributed on the floor or any supporting surface is essential. This helps maintain stability and allows for optimal force transfer through the lower body. Additionally, maintaining a neutral foot position with the weight evenly distributed across the heels and balls of the feet promotes proper alignment and engagement of the glutes.
For exercises like squats and deadlifts, maintaining a slightly turned-out foot position, with the toes pointing outward, can help recruit the glute muscles more effectively. This external rotation of the feet helps activate the gluteus maximus, which is a major muscle in the posterior chain.
It's important to note that individual variations and specific exercise requirements may influence foot positioning. Consulting with a qualified fitness professional or trainer can provide personalized guidance based on your goals and needs.
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Mark this and return
How is energy related to the change of state
represented by the model?
O Atoms gain energy as a gas changes to a solid.
Atoms gain energy as a gas changes to a liquid.
Atoms lose energy as a gas changes to a solid.
Atoms lose energy as a gas changes to a liquid.
Answers
The energy is related to the change of state represented by the model by: D. Atoms lose energy as a gas changes to a liquid.
What is Atoms?A model of the transition from a gas to a liquid is shown in the accompanying image. It demonstrates how atoms or molecules change from being widely scattered as in a gas to being concentrated as in a liquid.
The atoms in this process move from a higher-energy state to a lower-energy state releasing or losing energy in the process. The most common kind of energy loss is heat.
Therefore the correct option is d.
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the study of life-span includes the journey from conception to death. t or f
Answers
Answer:True(t)
Explanation:
Taiga is found in all of the following locations except _____________.
a.
Canada
b.
Asia
c.
Europe
d.
North America
Answers
Answer:
Canada I believe.
Explanation:
Epsom salts are solutes that do not pass through cell membranes. If one soaks in a hypertonic solation of Epsom salts, which of the following will occur?
a. water will enter the body by osmosis
b. the water will leave the body by osmosis
c. Epsom salts will enter the body by diffusion
d. Epsom salts will leave the body by diffusion
Answers
Answer:
B
Explanation:
The net movements of water from the region of higher water potential to the region of low water potential through a selectively permeable membrane is osmosis. It is a form of diffusion which involves the transport of water molecules.
In this present scenario water molecules pass through the selectively permeable membrane from higher water potential in the body, to lower water potential but high solute potential (Epsom salts). The later is called an hypertonic solution,this is because it has higher solute potential ,thus higher salt concentration than the surrounding medium,therefore water pass by osmosis into the Epsom salts.
If one is placed in this solution,the cells shrink as they lose water to the more concentrated Epsom.(hypertonic solution)
However, the body homeostatic mechanism through the kidney ensure re-absorption of fluid back to the body from the DCT and CT, via anti diuretic hormone to preserve the cell and the person.
what are some causes of co2 levels being higher in some area than others
Answers
Using fossil fuels like coal and oil has increased the amount of carbon dioxide in the atmosphere during the past century (CO2).
What did you mean by concentration?the state of being focused: the act or activity of concentrating. more specifically: focusing on a particular object. My attention is being disrupted by all that noise. a specialty within a major or a major itself in academics.
Why is concentration important in college?Your field of study or area of expertise is already decided when you declare a major in a subject like a biology, engineering, or business. You can strengthen your specialization with a much stronger focus on the area that interests you by choosing a concentration for your major.
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LIST THREE NATURAL PROCESS THAT AFFECT THE ECOSYSTEM
Answers
Answer:
1.)Ecological Succession
2.)carrying capacity
3.)population shocks
Explanation:
In what ways can humans change an ecosystem?
Answers
Answer: Humans can change ecosystems in many ways such as helping with pollution, another example is people can remove trees, change the flow of water, and change grasslands into farms.
Explanation:
Cell Work Unit Test
describe the relationship between a glose molecule and the products it makes during cellular respiration.
Answers
ATP is made via the metabolic process of cellular respiration, which breaks down glucose. The phases of cellular respiration are glycolysis, pyruvate oxidation, the citric acid cycle, or Krebs cycle, and oxidative phosphorylation.
Each glucose molecule undergoes a slow breakdown into carbon dioxide and water during cellular respiration. In the course of the processes that change glucose, some ATP is created directly. However, a process known as oxidative phosphorylation produces a lot more ATP later. The electron transport chain, which consists of a number of proteins lodged in the inner membrane of the mitochondrion, is what drives the process of oxidative phosphorylation.
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What gives the eye its shape?
Answers
Explanation:
The vitreous body forms two thirds of the eye's volume and gives the eye its shape.
HOLIDAY POINTS! HAVE A GREAT MONTH
Answers
Answer:
Fish. Dish Cheka veal eavhiea. Owen irajaef
Explanation:
When doing the experiment of crossing drosophila. What are the prevaution and sources of error ？
Answers
Explanation:
Precautions:
1. Proper handling of drosophila: It is important to handle drosophila with care, avoiding rough handling and exposure to extreme temperatures.
2. Keeping the experimental setup clean: The experimental setup should be kept clean to avoid contamination and the spread of diseases.
3. Selection of appropriate crosses: The selection of appropriate crosses should be done carefully to obtain accurate results.
4. Use of appropriate food and media: The use of appropriate food and media is crucial for the growth and survival of drosophila.
5. Proper labeling and record-keeping: Proper labeling and record-keeping of experimental setups and crosses help to keep track of the results.
Sources of Error:
1. Mutation: Mutation can occur randomly in drosophila, leading to unpredictable and unexpected results.
2. Environmental factors: Environmental factors such as temperature and humidity can affect the growth and development of drosophila, leading to inaccurate results.
3. Contamination: Contamination with other organisms or pathogens can affect the results of the experiment.
4. Cross-contamination: Cross-contamination of different drosophila strains can affect the results of the experiment.
5. Human error: Human error, such as incorrect labeling or accidental mixing of samples, can affect the accuracy of the results.
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Which base does Cytosine pair with?
A. Adenine
B. Guanine
C. Uracil
D. Thymine
Answers
Cytosine, a nitrogenous base found in DNA and RNA, pairs with guanine. The correct answer is option B.
This pairing is based on the complementary base pairing rule in which cytosine forms three hydrogen bonds with guanine. The other base pairs in DNA are adenine with thymine, and in RNA, adenine pairs with uracil. The complementary base pairing is crucial for DNA replication and transcription processes. Cytosine and guanine, along with adenine and thymine/uracil, form the base pairs that make up the rungs of the DNA double helix structure.Understanding base pairing is fundamental to understanding the structure and function of nucleic acids. Therefore, the correct answer is option B.For more questions on DNA
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Cytosine pairs with Guanine.
Explanation:The base Cytosine pairs with the base Guanine in DNA. This base pairing is a key component of the double-stranded DNA structure.
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