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Tcecarenko [31]
3 years ago
11

How do scientists produce new genetic variations not found in nature? by a transforming rna b using gel electrophoresis. c using

lasers to cut and paste dna. d causing mutations with chemicals or radiation?
Biology
2 answers:
valentinak56 [21]3 years ago
7 0
Scientists most often produce new genetic variations of organisms by causing mutations with radiation or chemicals and then selectively breeding in order to emphasize the desired traits in the new variations. The Dachshund is an example of this. By breeding two dogs with a similar mutation that caused student legs and elongated backs breeders were able to create a new variation not found in nature. 
makvit [3.9K]3 years ago
6 0

The answer is D: Causing mutations with chemical or radiation

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An organic compound formed is the dark reaction of photosynthesis is
blsea [12.9K]

Answer:

B i think

Explanation:

3 0
3 years ago
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hey all of you science talents I am in desperate needs of your help. Please don't answer randomly. Try your best and DONT ANSWER
Alex

Answer:

1. 25%

2. 75%

3. 1:2:1

Explanation:

6 0
2 years ago
Which characteristic differentiates amphibians from reptiles?
Stells [14]

Option D – amphibians may use their skin for gas exchange is the characteristic feature of amphibians that differs from reptiles.

Explanation:

The amphibian skin is moist, thin and marbled and supplied by blood vessels running on its surface. The moisture present in the skin dissolves the oxygen present in its surrounding which is absorbed by the blood vessels. Special glands help the amphibians to keep the skin moist.

The very thick and tough scales present on the reptiles prevent them to absorb oxygen through their skin. Hence, they breathe and respire through their lungs.

Amphibians have three-chambered heart. They do not develop amniotic eggs. Adult amphibians although spend much time on land, they breed only in water due to the absence of amniotic sac .

7 0
3 years ago
A climbing plant wraps around a lattice structure as it grows. This is an example of which type of tropism?
Sophie [7]

Answer: I believe it is Thigmotropism.

5 0
2 years ago
For each of the following statements, indicate
stepan [7]

The plants that were allowed to self pollinate were the F1 plants.

The plants that are true breeding are P generation plants.

The plants where there were 3times as many tall plants as short plants are in F2 generation.

<h3><u>Explanation:</u></h3>

This question is based on the Mendel’s Experiment. Sir Gregor Johann Mendel was the father of genetics who experimented on garden pea plants <em>Pisum</em> <em>sativum</em> to see whether the characters got mixed or not and to know the real cause behind different traits of same character in plants.

He took the pure homozygous tall and short plants separately which he called as parental generation or P generation. These plants were homozygous, hence pure breeding.

As these plants were crossed between themselves, then the F1 generation showed all tall plants. This is because of the heterozygous plants which showed character of dominant trait. These plants were allowed to self pollinate.

As a result of self pollination of the F1 plants, the F2 plants were 75% tall in number whereas the other 25% short, which gave the phenotypic ratio of 3:1.

4 0
3 years ago
Read 2 more answers
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