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Savatey [412]
3 years ago
6

Is the introduction of contaminants into a natural environment that causes instabilitying organisms and the physical environment

Biology
1 answer:
Dahasolnce [82]3 years ago
6 0

Answer:

ℴℴℴ

Explanation:

ℯℯ ℴ ℯ ℊ

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Write the common food chain of a pond ecosystem.​
kozerog [31]

Explanation:

In a freshwater aquatic ecosystem like a pond, the organisms in the food chain include algae, small animals, insects and their larvae, small fish, big fish and a fish-eating bird or animal

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Type of consumer
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herbivore eats only plants, ex. cow, squirrel, caterpillar

carnivore eats only meat, ex. tiger, wolf, shark

omnivore eats both plants and meat, ex. humans, birds, dogs

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The myelin sheath _____________________________________.
pochemuha
The myelin sheath (C) insulates the axons. 
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Which factor is a major influence on climate?
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A

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A because water is a essential resource to humans and all types of life.

4 0
3 years ago
A small percentage of the body’s iron supply circulates freely in the blood, bound to a protein called transferrin. Transferrin
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Answer:

What best describes how transferrin is transported through the erythrocyte plasma membrane is receptor-mediated endocytosis.

Explanation:

The incorporation of transferrin across the erythrocyte membrane depends on a transferrin receptor expressed on the surface of the membrane. The specific receptor recognizes the presence of iron-charged transferrin, transferin diferrica, incorporating it into the cell by endocytosis. Once in the cytoplasm, the iron is dissociated from the transferrin.

Free transferrin is called apotransferrin. The transferrin receptor has a high affinity for transferrin di-ferrica, which facilitates its incorporation by endocytosis, and the release of apotransferrin into the extracellular space.

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<em>     A. </em><u><em>Exocytosis</em></u><em> implies the exit of substances from the cell.</em>

<em>     B. </em><u><em>Pinocytosis</em></u><em> involves the invagination of the membrane to incorporate soluble substances into the cell.</em>

<em>     C. </em><u><em>Phagocytosis</em></u><em> is the incorporation of solid substances by invagination of the membrane.</em>

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3 years ago
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