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lys-0071 [83]
3 years ago
7

How did Watson and Crick determine base pairing?

Biology
1 answer:
Natali [406]3 years ago
3 0
<span>Watson and Crick determined the base pairing by using the new information to construct a new double-stranded helix model with the nitrogen bases paired A to T and C to G in the center. This base pairing immediately suggested to Crick that one side of the molecule could serve as a template to exactly replicate DNA sequences to pass on genetic information during cell reproduction. This second, successful model was unveiled in February 1951.</span>
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Fill in each blank with the correct word.
Sergio039 [100]

Answer:

the male reproductive cell is called a(n) sperm

the female reproductive cell is called a(n) egg

when the male and female cells join during fertilization, a(n) embryo forms

Explanation

During a males life, the sperm forms. During a females life, the egg forms. When a man and a woman fall in love, the reproduce, causing the sperm and egg join to form a embryo

5 0
4 years ago
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Which of the following occurs when oxygen transfer from the blood to the body's cells and tissues?
Snowcat [4.5K]

Answer:

B. External respiration

Explanation:

Respiration means transport of oxygen to the cells within tissues, and the transport of carbon dioxide in the opposite direction.

5 0
4 years ago
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What is the role of capillary action?
Ksju [112]

Answer:

Capillary action is important for moving water (and all of the things that are dissolved in it) around. It is defined as the movement of water within the spaces of a porous material due to the forces of adhesion, cohesion, and surface tension.

4 0
3 years ago
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This food web represents a community in a rain forest.
kolbaska11 [484]

Answer:

coatis would increase

sloths would increase

fruit bats would increase

Explanation:

The boa constrictor in this food chain is the top predator, thus it is on the top of the food chain. It preys on several of the animals on this list, such as the coati, sloth, and fruit bats, so it is regulating their numbers. If the boa constrictor is removed from the ecosystem, the ecosystem will lose its predator, so the animals on which the boa constrictor preyed upon will have no threat, thus will experience rapid increase in their numbers. The coatis, sloths, and fruit bats, all will be predator free in this scenario, so they will all experience increase in their population, which in turn will have big effect on all other species in the ecosystem.

7 0
4 years ago
Which of these is NOT a factor that affects enzyme activity?
madreJ [45]
Several factors affect the rate at which enzymatic reactions proceed - temperature,pH<span>, enzyme </span>concentration<span>, </span>substrate concentration<span>, and the presence of any inhibitors or activators.</span>
4 0
3 years ago
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