Phytoplankton uses photosynthesis to produce food. The correct answer is a. in the euphotic zone, phytoplankton uses sunlight to produce food.
What is phytoplankton?They offer food for a variety of marine animals in a healthy ecology. Microalgae, sometimes referred to as phytoplankton, are similar to terrestrial plants in that they have chlorophyll and need sunlight to survive and develop.
The tiniest, smallest producers in the plankton group are called phytoplankton. The foundation of aquatic food webs is made up of bacteria and algae. Diatoms, dinoflagellates, cyanobacteria (blue-green algae), and green algae are examples of common phytoplankton.
Green algae and cyanobacteria, sometimes referred to as blue-green algae, make up the majority of freshwater phytoplankton. Although other algae and cyanobacteria can be found, dinoflagellates and diatoms make up the majority of the marine phytoplankton.
Fish and other higher-order marine creatures, such as humans, depend on the phytoplankton food chain in different ways. While some phytoplankton are harmful and can kill fish or contaminate seafood with potent toxins, others are beneficial and are strong determinants of fish production.
Therefore, the answer is a.
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The principal hormone secreted by the corpus luteum, which prepares the uterus for pregnancy,
The corpus luteum, a temporary endocrine structure in females, produces the hormone progesterone which is crucial for maintaining pregnancy.
Explanation:The principal hormone secreted by the corpus luteum, which prepares the uterus for pregnancy, is progesterone. The corpus luteum is a temporary endocrine structure in female ovaries and is involved in the production of relatively high levels of progesterone, necessary to maintain a healthy pregnancy. Once the egg has been released from the follicle during ovulation, the remaining follicular structure is transformed into the corpus luteum. If a pregnancy occurs, the corpus luteum continues to produce progesterone, which helps maintain the pregnancy until the placenta is able to take over this function.
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1. Of the six species of seals found in Antarctica, four of them breed on the actual ice in the spring months. Which species of seal or ice expert?
A. Crab eater, leopard, harbor, elephant
B. Crab eater, leopard, fur, elephant
C. Crab eater, wedded, Ross, leopard
D. Ross, wedded, leopard, fur
2. Ice that forms and then melts seasonally around the coast of Antarctica is best described as
A. Oceanic ice
B. Glacial ice
C. Sea ice
D. Continental ice
3. All of the factors below play a role in creating ocean currents. Which factor has the greatest influence on weather patterns?
A. Earth’s rotation
B. Heat capacity
C. Salinity
D. Bottom topography
4. Cold water upwelling help increase the number of organisms in an area by bringing
A. Warm water to the area
B. More predators
C. More nutrients from the bottom
D. Warm water nutrients from the top
5. What is the difference between El Niño and La Niña?
6. Which of the following statements about sea surface temperature is evidence of La Niña year?
A. It is greater than normal in the Eastern Pacific
B. It is lower than normal is the Western Pacific
C. It is greater than normal in the Western Pacific
D. It is lower than normal in the Eastern Pacific
E. Normal Pattern
7. Why is it beneficial to use names for hurricanes over latitude-longitude identification methods?
8. Which of the following organisms does NOT rely on krill as a major food source?
A. Adélie penguins
B. Leopard seal
C. Humpback whale
D. Squid
9. Adélie penguins feed mostly on krill but switch to fish during the breeding season and then to squid during the winter. What is a good explanation for this?
A. Fish and squid are more abundant, and krill is more scarce
B. Fish and squid provide more energy than krill
C. Fish and squid is more abundant, and krill is more available
D. Fish and squid is preferred but is not as available during the other months
10. All of the following are ways the penguins stay warm EXCEPT
A. Swimming fast
B. Fat reserves
C. Layers of feathers
D. Staying close together in groups
11. The population of penguins has increased greatly over the past several decades. Part of this can be attributed to the over-hunting of baleen whales. Develop a logical argument for why these two occurrences can be connected.
A. how do fossils help document the descent of modern species from ancient ancestors?
Which bathymetric technique differentiates between multiple layers of the ocean bottom?
The bathymetric technique that differentiates between multiple layers of the ocean bottom is seismic reflection.
The seismic reflection can be described as the reflection of elastic waves between the bodies of rock at boundaries. These possess different physical properties. This study or technique is mainly used for research purposes.
A culture medium on which only gram-positive organisms grow and a yellow halo surrounds staphylococcus aureus colonies is called a(n)
Which human body system includes the lungs, liver, skin and kidneys?
are foxes asexual or sexual?
a fox can have either genders from male to female. they are not asexual.
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Which of the following best describes succession? A. The changes in species composition in a community over time as species colonize and area. B. The evolution of species through natural selection to becomes different species over time. C. All of these are good descriptions of succession. D. The reduction of biodiversity of an ecosystem over time.
Succession is a process which brings change in the composition of species in a community over a period of time. In this process a community undergoes change for the initial colonization of a new habitat. Succession begins with colonization of an area that has not been previously occupied by an ecological community. Succession continues till the climax community occupies that area.
Succession refers to the changes in species composition in a community over time. It can be primary or secondary, commencing with pioneer species in primary succession. The community eventually reaches an equilibrium state.
Explanation:The term 'succession' best describes option A, that is, the changes in species composition in a community over time as species colonize an area. Succession describes the sequential appearance and disappearance of species in a community over time. Two types of succession namely are primary succession and secondary succession. In primary succession, newly exposed or newly formed land is colonized by living things, often starting with pioneer species who have few soil requirements. Secondary succession occurs when part of an ecosystem is disturbed yet remnants of the previous community remain. As succession progresses, communities will gradually reach an equilibrium state, the composition of species within these communities changing over time until a more or less permanent community is established.
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What is the name for the process by which the cells of all organisms release the stored energy of nutrients?
I need help on this question
A radioactive tracer has a half life of 2 hours. How much of a 2500 g sample will be available after 24 hours?
A) 2.44 g
B) 1.22 g
C) 0.610 g
D) 0.31 g
Final answer:
Using the concept of half-life, we find that after 24 hours, which is 12 half-lives for a substance with a half-life of 2 hours, a 2500 g sample of a radioactive tracer will decay to 0.610 g.
Explanation:
The student is asking about the amount of a radioactive tracer remaining after a certain period, given its half-life. To calculate this, we apply the concept of half-life, which is the time required for half of the radioactive substance to decay. In this case, the half-life is 2 hours.
After 24 hours, which is 12 half-lives (24 hours ÷ 2 hours per half-life), the amount of substance remaining can be calculated as follows:
After 1 half-life (2 hours): 2500 g ÷ 2 = 1250 g
After 2 half-lives (4 hours): 1250 g ÷ 2 = 625 g
...
After 12 half-lives (24 hours): 2500 g ÷ (2^12) = 2500 g ÷ 4096 = 0.610 g
Therefore, the correct answer to the student's question is C) 0.610 g.
What is the minimum pulse ox reading the emt wants to maintain in the patient with spontaneous breathing?
which families of metals are not so reactive, which allows them to exist by themselves in nature?
Answer:
precious metals
What are the similarities and differences between fungi and plants?
Plants and fungi both have cell walls, which provide them with support and structure. But one main difference is that plants, unlike fungi, have the ability to photosynthesize.
Which of the following is a structure in some plants that produces male sex cells?
Phloem
Tracheophyte
Antheridium
Archeogonium
What is a life cycle that alternates between sexual and asexual reproduction called?
Archegonium
Antheridium
Alternation of Generations
Metamorphosis
Answer:
If this is the seedless plants practice, here is the answers.
1.b
2.c
3.d
4.c
5.c
Explanation:
the answers for this question are on 4 and 5.
How does changing the proteins produced in a cell alter what an organism does?
Final answer:
Changing the proteins produced in a cell can alter what an organism does through modifications to the RNA or protein, as well as mutations in the DNA or RNA.
Explanation:
Changing the proteins produced in a cell can alter what an organism does through various mechanisms. For example, modifications to the RNA or protein can affect the amount, function, and stability of the protein. Mutations in the DNA or RNA can also cause a protein to be made incorrectly, resulting in a loss of protein function. This can be detrimental to the organism as proteins are responsible for orchestrating almost every cell function and influencing most of the traits displayed by multicellular organisms.
Maya's father told her that hummingbirds like to drink the nectar from red flowers. Maya noticed that most of the hummingbird feeders in the store were made of red plastic. She wondered if this were really true. She decided to conduct an experiment to see if hummingbirds really preferred red flowers to other colors. Maya hung three bottles, upside-down, in her garden. One was red, one was green, and the last one was clear. She filled the bottles with the same sugar solution and screwed a drip nozzle into each one. Then she waited and watched. What is the independent variable in this experiment? A) the color of the feeder B) the location of the bottles C) the amount of sugar solution D) how much the hummingbirds ate
Answer:
The color of the birdfeeders
Explanation:
Independent variable is the variable in the experiment that is changed, so the only thing changed in this experiment is the colors of the bird feeders
Answer:
B
Explanation:
the location of the bottles and the sugar solution
Women who wish to become pregnant should have sexual intercourse after a surge in: women who wish to become pregnant should have sexual intercourse after a surge in: luteinizing hormone (lh). progesterone. follicle-stimulating hormone (fsh). androgens.
A client with a history of opiate abuse asks the nurse, "why do i crave this stuff so much?" the nurse responds, knowing that the client's craving is a result of which factor?
Final answer:
The craving the client experiences is likely a result of psychological dependence on opiates, where the brain's reward system has been altered to create intense cravings. The development of tolerance and the use of rehabilitation methods including psychotherapy and medication can assist in overcoming addiction.
Explanation:
The client's craving for opiates is likely due to psychological dependence, which is an emotional, rather than physical, need for a drug. Clients with a history of opiate abuse develop this dependence because these drugs alter the brain's reward system, leading to intense drug cravings. To answer the client's question, the nurse should explain that craving opioids is a common effect of the psychological dependence that can develop after repeated use, and even after the physical withdrawal symptoms have resolved.
Over time, a person who uses opioids may develop tolerance, meaning they need higher doses of the drug to achieve the same effect, which further exacerbates the cycle of dependence and addiction. Withdrawal symptoms from opioids can include not only physical discomfort but also psychological distress like anxiety and depression. To treat addiction, rehabilitation may involve psychotherapy, support groups, and sometimes medications like methadone to help manage cravings and withdrawal symptoms.
Compare and contrast the characteristics of vascular and nonvascular plants
The primary distinction between vascular and nonvascular plants is that vascular arteries transport water and food to all areas of the plant.
Starting with the smallest level of ecological organization and moving toward the highest, the order should go organism, __________. view available hint(s) starting with the smallest level of ecological organization and moving toward the highest, the order should go organism, __________.
Answer:
The correct answer will be option-organism→population→community→ecosystem→biosphere
Explanation:
Ecologists have tried to organize the ecosystem into levels which gave rise to the concept of ecological level of organization.
In an ecosystem, the ecological organisation move from simplicity to complexity in which the lowest level is an organism or species. When these similar organisms live together they form a population. A group of these population form a community of organism which forms an ecosystem in the biosphere.
Thus, the ecological organization will be organism→population→community→ecosystem→biosphere
What would happen if a cell underwent mitosis, but did not go fully complete cytokinesis?
Describe the characteristics of two hybrid seeds of the green revolution
Rendon has been using xanax for a period of over six months. alex, his friend, asks him to stop using the drug as it adversely affects the body. brendon listens to alex and discontinues taking the drug. however, upon withdrawal, he experiences immense physical pain accompanied by increased craving for the drug. this is most likely due to
The reason of why Brendon experience immense physical pain and increased craving upon withdrawal because of physical dependence. Physical dependence is a physical condition that occurs after a gradual drug withdrawal in which the drug is being chronically used that upon withdrawal, it causes unpleasant symptoms, mainly, physical.
A patient with visual agnosia will probably show an inability to
A patient who suffer visual agnosia will probably show an inability to identify or recognize common objects in a plain view and they cannot interpret visual information. This is due to the damage in anterior cortex like the temporal lobes and posterior occipital of the brain. Additionally, visual agnosia is diagnosed by assessing the patient’s ability to name and describe the use of visually presented objects
Which of these is a behavioral response determined by past experience?
A. sleeping
B. eating
C. hunting in packs
D. All behaviors are learned from past experiences.
like that other person said its c i am totaly not copying you
Where does most seismic activity occur?
in the center of tectonic plates
along tectonic plate boundaries
in mountains
deep within the earth
Part a - bacterial cell wall peptidoglycan is a polymer of millions of n-acetylglucosamine (nag) and n-acetylmuramic acid (nam) sugars based on glucose molecules linked together in long chains cross-braced with four amino acids that link individual polymer chains together in a chain-link fence pattern. layers of cross-braced nag and nam sheets are stacked vertically and held together by proteins with lipid anchors attached to the cell's cytoplasmic membrane to form a scaffold of sugars and proteins that is able to hold the bacterial cell's shape, even in response to extreme osmotic pressures. how would you expect a microbiology student to be able to describe the composition of peptidoglycan? what is the composition of the peptidoglycan layers found in the cell wall of bacteria?
When atp releases some energy, it also releases inorganic phosphate. what happens to the inorganic phosphate in the cell?
When ATP releases energy, inorganic phosphate can be used in various cellular processes such as phosphorylation of other compounds or stored as glycogen.
Explanation:When ATP is broken down, usually by the removal of its terminal phosphate group, energy is released. The energy is used to do work by the cell, usually by the released phosphate binding to another molecule, activating it. For example, in the mechanical work of muscle contraction, ATP supplies the energy to move the contractile muscle proteins. In the case of inorganic phosphate, it can be used in various cellular processes such as phosphorylation of other compounds or stored as glycogen.
Cultivation of seafood under controlled conditions is called