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larisa [96]
4 years ago
6

What is the main function of the cell membrane and the cell wall?

Biology
1 answer:
svet-max [94.6K]4 years ago
3 0
Cell membrane not to sure about but cell wall was made by donald trump because you know how much he likes walls lol 

anyway the cell membrane is selectively permible to ions
the cell wall dosent let anything by but is only found in plant cells
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50 POINTS!
andrezito [222]

Answer:

carbon dioxide → phytoplankton → shrimp → fish → whales

Explanation:

Phytoplankton consumes carbon dioxide, shrimp eats phytoplankton, fish eats shrimp, and whales eat fish.

4 0
3 years ago
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The nervous system that controls respiration is called autonomic because it
sasho [114]
<span>The nervous system that controls respiration is called autonomic because it isn't subject to voluntary control. Autonomic Nervous System (ANS) is responsible for regulating the functions of the body's internal organs like the heart, stomach, and intestines. It is a division of the peripheral nervous system that acts unconsciously and it regulates bodily functions like heart rate, digestion, and respiration. The hypothalamus is the part of the brain that regulates the Autonomic Nervous System. Other reflex reactions like coughing, sneezing, swallowing, and vomiting are also part of autonomic functions that occur in the body.</span>
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3 years ago
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Describe the general flow of energy through an ecosystem beginning with the Sun and going through a third order consumer.
Illusion [34]

Answer:

1) Autotrophs transform solar energy into chemical energy.

2) Herbivores and omnivores (primary consumers) eat producers, make use of some of the energy, making from it their biomass.

3) Following, carnivores or predators (secondary, tertiary, and other consumers) eat herbivores, using only 10% of the flowing energy.

4) Decomposers (last order in the chain) recycle all the dead organic material and make use of some of the stored energy.  

Explanation:

<u>Energy flow: </u>From the whole quantity of energy that reaches the earth's surface, only 0.1 or 1% is absorbed by autotroph organisms or producers.  

From this input of solar energy, it begins a unidirectional energy flow through all the organisms in the ecosystem, from autotrophs to heterotrophs, until it is finally dissipated in the environment.  

Organisms that can use light, and turn it into organic matter according to their own needs are producers, and they are called autotrophic organisms. These organisms are by excellence all plants, algae, and bacteria that photosynthesize. Organisms that are incapable of producing their food are called heterotrophic. They depend on other organisms from the trophic chain such as plants or other animals to feed on, so they can get proteins and energy.  In the trophic web, heterotrophic organisms occupy the first, second, or third consumer level, after producers.  There are different types of heterotrophic animals: carnivorous, herbivorous, omnivorous, hematophagous, ichthyophagous, and etcetera. All of them depend on autotrophic organisms.

At each trophic level, it occurs an energy transfer from one level to the next, with only 10% being usable in each of them. This assessment is called <u>"The 10% rule".</u> This is, as a general rule, only about 10% of the energy stored as biomass at one trophic level, per unit time, ends up as biomass at the next trophic level, in the same unit of time.

The progressive reduction of energy determines the number of trophic levels in the chain (4 or 5).  

1) Autotrophs use water, CO2, and solar energy to produce O2 and glucose, by the process of photosynthesis and convert it into biomass. Producers transform solar energy into chemical energy.

2) Herbivores and omnivores (primary consumers) make use of some of this energy to survive, making from it their biomass. The rest of the energy is lost.

3) Following, carnivores or predators (secondary, tertiary, and other consumers) eat herbivores, using only 10% of the flowing energy. The rest of the energy is lost.

4) When different organisms die, decomposers (last order in the chain) recycle all the organic material and make use of some of the energy stored in their tissues. The rest is lost.

4 0
3 years ago
What is the name for the number of species that live in an ecosystem
Snowcat [4.5K]

Answer:

species richness is the number of species in an ecosystem

4 0
3 years ago
Starch molecules present in a maple tree are made from materials that originally entered the tree from the external environment
kherson [118]
Starch molecules present in maple tree ............................................. from the external environment as INORGANIC COMPOUNDS.
Starch is made in the maple tree during the process of photosynthesis. The inorganic substances that are used during the process of photosynthesis are carbon dioxide and water; these two are mixed together in the presence of sunlight to form carbohydrates.
5 0
4 years ago
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