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djyliett [7]
3 years ago
15

Transport of materials into a cell against a concentration gradient, from low to high, requires A) water. B) energy. C) osmosis.

D) a passageway.
Biology
2 answers:
N76 [4]3 years ago
5 0
The answer to this is B
sesenic [268]3 years ago
3 0

Answer:

b) energy

Explanation:

To survive, cells require many substances to be at higher concentrations inside the cell than outside of it. This is known as active transport and requires cell energy.

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ILL MARK BRAINLY! A model of a typical food web is shown here. Extensive pesticide spraying has taken place and the arthropods,
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Answer:

D) increased nematodes, decreased animals.

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WIth fewer things to eat, animals will likely die out, and with nothing to control the growth of nematodes, their population with grow rapidly and out of control.

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During meiosis, a defect occurs in a cell that results in the failure of microtubules, spindle fibers, to bind at the kinetochor
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Answer:

The resulting cells will not receive the correct number of chromosomes in the gametes, a condition known as aneuploidy.

Explanation:

Formation of functional microtubule spindle fibers and their attachment to kinetochores of chromosomes is required to ensure their alignment st the cell's equator during metaphase. During anaphase, shortening of these microtubules pulls the chromosomes to the opposite poles. These events ensure the distribution of the correct number of chromosomes among the daughter cells. The presence of defective microtubules would not allow proper distribution of chromosomes to the daughter cells and would result in the presence of an abnormal number of chromosomes (aneuploidy).

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3 years ago
Two students are in a baseball game. The first student hits a ball very hard and it has a
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Answer: 1st law
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7 0
3 years ago
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Starch is a carbohydrate formed by bonded glucose molecules. What type of reaction does this represent? A.) ATP B.) cellular res
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Answer:

D. Dehydration synthesis

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1. water temperature of lakes and rivers rise - nuclear power plant. Water is used as a coolant to maintain the temperature of nuclear reactors. and the resulting water is warmed up.
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4. soil contamination of water resources - </span>DDT spraying in agriculture. DDT washes off agricultural land into water resources.
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5. sewage contamination of water resources -</span>population density. Urban areas produce a low of sewage, which is usually treated before being disposed of in rivers or the sea.
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6. excess plant growth in the lakes or rivers - </span>phosphate detergents. In many rivers, algal growth is limited by phosphate. Once excess phosphate is released to rivers, exponential algal growth can occur.<span>

7.reduces farmland and plant life to cleanse air - </span>urban sprawl. Urban sprawl uses up land for houses in an inefficient manner that could have been used for farming or natural areas.
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8. studies air,water, and land - </span>ecologist. Ecology is the study of <span>relations of organisms to one another and to their physical surroundings.</span><span>








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8 0
3 years ago
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