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irga5000 [103]
2 years ago
11

Why is variety in crop plants important for food security?

Biology
1 answer:
aev [14]2 years ago
4 0

Answer:

Disease and Famine

Explanation:

If there is a disease that affects a type of plant, having other types of crops to rely on could save one from starvation. Also, only planting one crop in an area can change the pH and nitrogen levels in negative ways, so that eventually no plants can grow there. Not to mention the obvious balanced diet needed for a healthy body.

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How did Cyanobacteria cool earth?
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Answer: it produced oxygen as a waste product

Explanation: there was more free oxygen

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3 years ago
A student places a healthy potted plant and a plastic straw in a closet for two weeks. After two weeks, the student observes tha
vivado [14]

Answer:

Plants need water and sun to create their food source, glucose. When the plant was left in the closet it didn't have access to the sun. One of the requirements of life is that all living things need energy/have a metabolism. Without food the plant eventually died.

3 0
3 years ago
Genetic diversity is ultimately/mainly the result of _______________
RUDIKE [14]

Answer:

A. meiosis.

Explanation:

Meiosis is one of the two major types of cell divisions in living organisms. Meiosis is the process by which four daughter cells that are genetically different from the parent cell are produced. Meiotic process is carried out solely during sexual reproduction to yield gametes or sex cells.

The gametes have their chromosomal number reduced by half during the process. However, one immense importance of meiosis is that it PROMOTES GENETIC DIVERSITY. A process called crossing over, which is the exchange of chromosomal segment between non sister chromatids, makes this possible.

7 0
2 years ago
Fats and steroids are examples of which macromolecules​
abruzzese [7]

Answer:

Types of biological macromolecules

Biological macromolecule Building blocks Examples

Lipids Fatty acids and glycerol Fats, phospholipids, waxes, oils, grease, steroids

Proteins Amino acids Keratin (found in hair and nails), hormones, enzymes, antibodies

Nucleic acids Nucleotides DNA, RNA

Explanation:

6 0
3 years ago
Please answer!!
Mariana [72]

Answer:

C. Immune system

Explanation:

7 0
3 years ago
Read 2 more answers
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