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Dimas [21]
3 years ago
11

As scientists have developed more productive crop varieties, farmers have switched from growing many traditional varieties to ne

w high-yield varieties. For example, in Peru, the Indians once grew 500 native varieties of potatoes. That number has been reduced to about twenty major potato varieties, worldwide.
Biology
1 answer:
Jobisdone [24]3 years ago
3 0

Switching from traditional crop varieties to new high-yielding varieties of potatoes will lead to a <u>reduction</u> in the<u> </u><u>varieties of potato</u><u> </u>as well as the <u>potato</u><u> </u><u>gene pool</u><u>.</u>  

Explanation:

This switching led to the green revolution in many countries with increased production of crops. However, the traditional healthier varieties of crops are lost over the period and only the newer high-yielding varieties remain. When the genetic pool of a crop is downsized it leads to declining of the genetic diversity.  

A large gene pool will help to maintain the genetic diversity of a species to withstand environmental challenges and stresses. Smaller a gene pool becomes, greater are the chances for it become wiped out or extinct.  

Hence to maintain the gene pool of a crop and the genetic diversity, traditional varieties should be maintained.  

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What happens in animal cells when mineral concentration is high and low in solution
slamgirl [31]

Answer:

Diffusion occurs when there is movement of minerals from an area of higher to lower concentration, till equilibrium is obtained.

Whereas Osmosis is the movement of solvents rather then the solute, from a solution of lower to a solution of higher concentration with the help of semipermeable membrane.

Explanation:

Diffusion is the movement of substances from area of higher concentration to an area of lower concentration of minerals, which mainly results in animal cells. Whether solute or solvent, diffusion occurs for both. Diffusion does not requires any semi permeable membrane. Diffusion occur in all state of matter, that solid, liquid and gas, whereas osmosis occurs only in liquid state. Osmosis requires semipermeable membrane and rate of which is related to concentration of solute dissolution in solvent medium. Only movement of solvent medium takes place. Classical example of osmosis is exhibited by cell membranes of animal cells. On the other hand diffusion is the spreading of perfume or fragrances to the external air.

6 0
2 years ago
Dr. Lee asks you what cancers (besides breast and cervical) Mrs. Payne should be screened for. Choose the single best answer.
Anuta_ua [19.1K]

Answer: Option B) Ovarian cancer

Explanation:

Just as breast and cervical cancer, ovarian cancer is exclusive to female humans.

Since, Mrs. Payne is a female, hence her ovaries should be screened for any cancerous growth.

Thus, Ovarian cancer is the answer

8 0
3 years ago
Compare and contrast what happens in mitosis and meiosis and discuss the importance of each process to a living organism.
34kurt
Mitosis is a process of cell duplication during which one cell gives rise to two genetically identical daughter cells.
meiosis a division of germ cells involving 2 fussions of the nucleus and giving rise to four gamates, each possessing half the number of chromosomes of the origional cell.
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3 years ago
The total energy of motion in the particles of a substance; heat energy
Keith_Richards [23]

Answer:

thermal energy

insulator

Explanation:

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3 0
3 years ago
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Answer:

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Explanation:

5 0
2 years ago
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