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allsm [11]
3 years ago
10

HeLa cells are a group of cells that were removed from Henrietta Lacks in 1951. These cells have been growing ever since they we

re removed. Which research tool best aids in growing a large number of cells outside of a body over a long period of time?
1. microscopes
2. cell culturing
3. immunostaining
4. genetic methods
Biology
1 answer:
ivolga24 [154]3 years ago
5 0
Answe well be 2 because I take the quiz
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From a large-scale screen of many plants of Collinsia grandiflora, a plant with three cotyledons was discovered (normally, there
Aleksandr-060686 [28]

Answer:

The cross is as follows:

P: D/d × d/d

Explanation:

Half of the F1 progeny are mutant. The mutation results in 3 cotyledons is dominant and the original mutant is heterozygous.

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The cross is as follows:

P: D/d × d/d

F1 denotes D/d three cotyledons

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3 years ago
In the 1950s, when Watson and Crick were working on their model of DNA, which concepts were well accepted by the scientific comm
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Answer:

The correct answer will be-

1. Chromosomes are made up of protein and nucleic acid.

2. Genes are located on chromosomes.

3. Chromosomes are found in the nucleus.

Explanation:

Watson and Crick are known for their findings on the structure of DNA in 1953. Their findings were motivated by the book called "What is Life?".

The book stated the concepts which were well accepted by the scientific communities that is the gene determines the trait which is located on the chromosomes proved by the experiments of Morgan.  

The chromosomes are the condensed structure present in the nucleus was suggested by the Nageli in 1884. The chromosomes are composed of nucleic acid and protein was also proved and was well-accepted fact.

But the genes are made up of DNA was not well accepted which was suggested by the experiments of Avery in 1940s.

Thus, the selected options are the correct answer.

5 0
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How can a species develope genetic diversity
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Sexual reproduction results diversity
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In what environment would ice wedging occur?​
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Answer:Ice wedging is common where water goes above and below its freezing point (Figure below). This can happen in winter in the mid-latitudes or in colder climates in summer.

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