Which is an example of positive gravitropism?

Biology

1 answer:

AveGali [126]3 years ago

4 0

Answer:

c. the plant root growing down into the soil

Explanation:

The plant root going down deep into the soil is an example of positive gravitropism. Gravity pulls everything towards the center of earth i.e. downwards and roots follow the direction of gravity automatically by growing downward towards soil that is why it is known as positive gravitropism. In short we can say that root favors the direction of gravity.

Shoot on the other hand show negative geotropism/gravitropism i.e. it grows towards the opposite direction of gravity. Shoot grow towards upside direction i.e. away from the surface towards sky.

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erma4kov [3.2K]

Answer:

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Explanation:

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3 years ago

Read 2 more answers

A competent bacterial strain with genes a, b, and c is transformed by a donor bacterial fragment. Cotransformation frequencies f

mina [271]

Answer:

a) Genes b and c are farthest apart.

Explanation:

Transformation occurs when a competent bacteria cell takes up genetic material from the environment. Usually a donor cell donates its gene fragment which is then incorporated into the chromosome or plasmid of recipient bacterial cell.

Cotransformation occurs when two genes are taken up together by the recipient. The closer the genes lie to each other, more are the chances of them being taken up together. Contransformation frequency will be higher if two genes are close to each other. Here, cotransformation frequencies between three genes are given. Amongst them, the lowest frequency is 0.0064% which is present between gene b and c. Hence, gene b and c are the farthest apart.

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2 years ago

Calculate the genotypic and phenotypic ratios for the following crosses in peas for height, determined by the T gene. (T is Tall

REY [17]

1. G= 0:4:0
P= 4:0
2. G= 2:2:0
P= 4:0
3. G= 0:2:2
P= 2:2
4. G= 1:2:1
P= 3:1
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