Answer:
Carbon, Hydrogen, Nitrogen, and oxygen
Explanation:
Trophic levels are the way ecology uses to organize the organisms that make up a food chain, where mass and energy transfer occurs between individuals or populations. The components of these chains can be simplistically divided into three broad groups: producers, consumers and decomposers. Foods that are involved in trophic levels have as their main elements carbon, hydrogen, nitrogen and oxygen. These elements are present at all trophic levels and are responsible for helping energy move from one trophic level to another.
Compare different scientist's point of view for the theory of evolution (Lamark and Darwin)
____ of all vertebrates are general sensors for touch, pressure, and pain. A) Olfactory receptors. B) Chemoreceptors. C) Photoreceptors. D) Mechanoreceptors.
Answer: D) Mechanoreceptors
Mechanoreceptors of all vertebrates are receptors in the skin that detect sensations of touch, pressure, and pain. Olfactory receptors detect odorants.
Chemoreceptors are for the detection of changes in blood oxygen and carbon dioxide, while photoreceptors are used for color vision.
How long does it take for the moon to complete one cycle?
Which of the following is an example of internal regulation during the cell cycle?
A: a gap outside of the cell (caused by skateboarding accident) triggers cell
division.
B: a cell receives a signal from the cell's own nucleus to divide.
C. Tumor cells continue to divide without receiving a signal.
D: Hormones in the blood cause cell growth in a growing teenager.
The option that gives an example of internal regulation during the cell cycle would be a cell receiving a signal from the cell's own nucleus to divide. The correct option would be B.
Internal regulation of cells refers to the reaction of certain parts of cells to a signal given from the control center of cells. In other words, it refers to the control of processes in order to ensure that the required limits are not breached.
There are different checkpoints in a typical cell cycle and cells will not proceed to the subsequent stage of the cycle if there is no go-ahead from the control center once the checkpoints are reached.
The checkpoints ensure that things are in order before moving to the critical stages of the cell cycle. If the checkpoints are breached, the cell could lose control and divide uncontrollably.
Hence, a cell receiving signals from the nucleus to divide is an example of internal regulation.
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What starts an involuntary swallowing action when it senses food
The weather patterns seen on earth are influenced greatly by a. Constant motion of the tech tonic plates b. Strength and direction of earths magnetic field c. Amount of oxygen in the troposphere d. Cycling of water in and out of the atmosphere
Does anybody know the phylum and class of the horseshoe crab?
The lymph system is a network of small vessels and organs that includes _____.
a. the thyroid, the thymus, and the lymph nodes
b. the spleen, the thyroid, and the lymph nodes
c. the spleen, the thymus, and the adrenal glands
d. the spleen, the thymus, and the lymph nodes
Which cloud type is typically associated with thunderstorms
If Earth was like a hard boiled egg, which part of earth would the egg yolk represent? A) Core, as it makes up the most part of earths diameter. B) Core, as it lies between the crust and the mantle. C) mantle, as it lies between the crust and the core. D) mantle, as steps is less than 100 kilometers.
Answer:
A) Core, as it makes up the most part of earths diameter.
Explanation:
Comparing the earth to a boiled egg, cut in half, we can recognize its parts and its interior:
The earth's crust corresponds to the eggshell; It is the most superficial and hard layer of the earth, formed by rocks. The crust is not formed by just one part, but several others that are the large plates that float over the mantle.The mantle corresponds to the egg white, which is the layer located just below the earth's crust and composed of very hot rocks that move constantly. In the center of the earth there is a large core, which corresponds to the egg yolk. This is the warmest part of the earth. The core is divided into two, the outer, which is liquid, and the inner, which is solid.Most human genetic disorders are caused by the expression of_____
A) recessive alleles
B)two dominant alleles
C)one dominant allele
D) sex-linked heredity
If fission takes place every 20 minutes in some bacteria, then starting with one bacterial, how many bacterial cells would be produced in three cell divisions or one hour
Why is cancer so difficult to treat ?
Maddy, Carole, and Maria are enjoying a day at the beach. They are body surfing and playing on their boards. Imagine that wave A catches up with wave B. Describe the change, if any, in wave amplitude
Answer: A new, larger wave C, knocks down the girls.
Explanation: Maddy, Carole, and Maria are enjoying a day at the beach. They are body surfing and playing on their boards. Imagine as the girls play, wave A catches up with wave B. What might be the result of this interact? A) A new, larger wave, wave C, knocks the girls down. B) A new wave, wave C, is much smaller than either wave. C) Wave A cancels out wave B and the girls cannot body surf. D) Wave A and wave B cannot interact as they are too far apart.
What is the process of developing a cultivated group of domesticated animal??
Animal husbandry is the process of developing a cultivated group of domesticated animals. It involves steps like selection based on desired traits and artificial selection to ensure these traits are passed down through generations. Over time, this creates a new breed of animal that is more beneficial for human use.
Explanation:The process of developing a cultivated group of domesticated animals, or animal husbandry, involves controlled breeding to highlight desirable characteristics and diminish undesirable ones. The initial step is selection, where specific animals showcasing traits such as productivity, hardiness, or gentle temperament are chosen to reproduce. Artificial selection is then applied, where humans influence the breeding and survival rates of animals based on these traits.
Over generations, these traits become common within the group, effectively creating a new line or breed of the animal that is more beneficial for human use. Examples of this process can be seen in the various breeds of dogs, cattle, and poultry that have been developed for different uses.
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One way of balancing the concentration of ions and molecules within a cell is to use all but ______________ . ATP transfers one of its phosphate groups (becoming ADP) to a transfer protein. This protein changes its conformation so it can bring needed ions into the cell and get rid of unnecessary ions.
A) cellular energy
B) active transport
C) membrane protein
D) phospholipid channels
its d phospholipid channels i just took it on usatestprep
in order to continually use the same area of land for agriculture, some farmers apply fertilizers to improve the level of nitrates in the soil. an alternative to this intensive use of fertilizer is to plow the roots of the leguminous plants back into the soil and leave the area unplanted for a season. why would a farmer use this alternative method and what would be the benefit of turning over the soil and leaving the old pant roots?
Farmers might choose to plow leguminous plant roots back into the soil and leave the area fallow to naturally replenish the soil's nutrients. This practice uses rhizobia, bacteria that fix nitrogen from the atmosphere into a usable form for plants. This alternative to synthetic fertilizers aids soil fertility and promotes sustainable farming.
Explanation:To maintain the fertility of farming lands without a constant use of fertilizers, farmers can resort to an alternative method, such as plowing leguminous plant roots back into the soil and leaving the area fallow for a season. Leguminous plants interact with soil bacteria, known as rhizobia, in a symbiotic relationship to influence nitrogen fixation. This is the transformation of atmospheric nitrogen into ammonia, a compound that plants can easily utilize. The incorporation of legume roots into soil not only provides a natural and sustainable supply of nitrogen but it also improves the overall soil fertility due to the nitrogen left behind by the root system.
Shifting toward this practice of extensive or shifting cultivation involving various plots of land serves both the environment and the farmer. For one, it minimizes the use of chemicals and thus promotes the sustainability of agricultural practices. Moreover, leaving a plot fallow for a certain period allows the soil to regenerate and accumulate fresh nutrients naturally. Furthermore, turning over the soil and leaving the old pant roots enhances the nutrient content of the topsoil, making it more fertile for the next planting season.
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Help fast, please!
The human activities in two locations are described below:
Location A: Oil drilled from several mines
Location B: Unregulated harvesting of trees
Which statement is most likely true?
Bird population will increase in Location A because of improved habitat.
Air quality will improve in Location A because drilling does not cause pollution.
The water will be contaminated in Location B because of increase in oxygen gas.
There will be mass migration of humans from Location B because of food scarcity.
ANSWER : Option D) There will be mass migration of humans from Location B because of food scarcity.
Explanation : As in the Location B there is unregulated harvesting of trees is going on, the forest resources would get reduced which will decrease the amount of products that were many peripheral mass were dependent on; So in search on new place and better food options the mass population will migrate.
Answer:
Option D, I got it correct :D
Explanation:
Also pls give the other person brainliest because they are correct :)
Which statement best summarizes Gregor Mendel's contribution to science? Question options:
Mendel invented the green pea by cross-breeding thousands of pea plants. Mendel coined the word genes to describe inherited traits.
Mendel determined that garden pea plants can produce flowers in a variety of colors.
Mendel found evidence that factors for some traits are inherited from parents.
Answer:
Its the last one
just give the other person brainliest
Explanation:
Please help me please
HURRY!!!! The image shows a group of birds flying in a V-shaped pattern.
Which statement is best supported by the image?
A.The birds are close together so they have a better chance of finding mates and increasing their reproductive success.
B.The birds are part of a eusocial society so they have a better chance of finding mates and increasing their reproductive success.
C.The birds are aerodynamically efficient so they can use the air around them to reduce the energy used to fly.
D.The birds are part of a eusocial society so they can use the air around them to reduce the energy used to fly.
Answer: Option C
Animals moving in packs or flocks, try to utilize the energy efficiently. The same case is with birds moving in V shape. They use the energy of the air around them, so that air pressure could help them fly with less input of energy. V shape pattern is more aerodynamically energy efficient.
Also, while flying there are no chances of finding mates for reproduction, so option A and B are incorrect.
Answer: Option C
Animals moving in packs or flocks, try to utilize the energy efficiently. The same case is with birds moving in V shape. They use the energy of the air around them, so that air pressure could help them fly with less input of energy. V shape pattern is more aerodynamically energy efficient.
Also, while flying there are no chances of finding mates for reproduction, so option A and B are incorrect.
What is the estimated age of Earth? 10 billion years 6.4 billion years 2.6 billion years 4.6 billion years
Answer:
4.6 billion years
Explanation:
I just finished this test with a 100% lol
Can I get some help? Thank you!
Which statement best describes the relationship among proteins, DNA, and RNA?
A. RNA makes DNA, and DNA makes proteins.
B. Proteins make DNA, and DNA makes RNA.
C. DNA makes RNA, and RNA makes proteins.
D. Proteins make RNA, and RNA makes DNA.
what is the central dogma of molecular biology
The central dogma of molecular biology describes the process by which genetic information flows from DNA to RNA to proteins. It involves transcription and translation. Understanding this process is key to understanding how cells function and regulate activities.
The central dogma of molecular biology explains the flow of genetic information within a biological system. First articulated by Francis Crick, it states that genetic information is stored in DNA, which is then transcribed into RNA. This RNA is subsequently translated into proteins, which perform most cellular functions.
This fundamental principle involves two main processes:
Transcription: DNA is used to make RNA.Translation: RNA is used to synthesize proteins.Understanding the central dogma is crucial as it encompasses how genes encoded in DNA result in functional proteins, allowing for cellular activities and regulation.
PLEASE MATCH THESE
1.communication
A. inner space
2. oceans
B. artificial gills
3. moon
C. bathyscaph
4.
Trieste
D. precipitation
5. sun
E. Apollo 11
6. the result of condensation
F. sea slugs
7. Jacques Cousteau
G. pharmacology
8. anesthetic
H. radiation source
9. vanadium
J. telemetry
explain what roots do
Sickle cell disease results from an amino acid change from Valentine to glutamic acid. The result of this amino acid change is a deformed hemoglobin protein that does not carry oxygen well. What type of genetic mutation caused the amino acid change in a person with sickle cell anemia?
a. frameshift mutation
b. silent mutation
c. nonsense mutation
d. missense mutation
a quick automatic response to something in the environment is called
Why do you need both muscles and bones to move your body?
Both muscles and bones are necessary for movement because the muscles act as the force to move the levers of the bones, which provide the rigid structure necessary for movement. Muscles attach to bones via tendons and contract to pull on the bones. This partnership of muscle contractions and bone levers is what enables the wide range of movements in the human body.
To understand why muscles and bones are both necessary to move your body, it's key to know about the musculoskeletal system. This system is composed of the muscular system and the skeletal system working together to facilitate movement. The bones provide a sturdy framework and act as levers, while the muscles provide the force to move these levers. Muscles are attached to bones via strong connective tissues known as tendons. When muscles contract, they pull on the bones to which they are attached, causing movement.
The system operates because muscles can only contract (shorten) and cannot actively extend, they do so against the rigid framework provided by the skeletal system. Muscles are often organized in antagonistic pairs, meaning that one muscle contracts to move a bone in one direction, while another muscle contracts to move it back. Furthermore, the skeletal system offers points of attachment for the muscles and transmits forces that muscles generate during contraction.
Overall, muscles cannot effectuate motion without a rigid structure to work upon, which is why bones are critical. Conversely, bones cannot move on their own without the contractions generated by the muscles. This interplay of muscles and bones allows us to perform activities as diverse as standing, walking, running, and picking up objects.
Which of the following is the best example of a community?
A.
a warm, humid climate with plenty of rainfall
B.
a nest of mockingbirds, some bullfrogs, a pond, and a sandy shore
C.
bees and wasps around a group of purple cornflowers
D.
a school of sunfish
Option B, a nest of mockingbirds, some bullfrogs, a pond, and a sandy shore, is the best example of a community.
Explanation:The best example of a community is option B, a nest of mockingbirds, some bullfrogs, a pond, and a sandy shore. This option includes multiple species living together in the same habitat and interacting with each other. Mockingbirds, bullfrogs, and other organisms in the ecosystem form a community by sharing resources, competing for food and mates, and potentially depending on each other for survival.
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Option C, bees and wasps around a group of purple cornflowers, is the best example of a community.
Explanation:A community refers to a group of different organisms living together in a particular habitat and interacting with one another. Based on the given options, the best example of a community is option C, which describes bees and wasps around a group of purple cornflowers. In this case, the bees, wasps, and cornflowers form a community where they interact and depend on each other for survival.
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