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3 years ago

What property of henrietta lacks' cells was most unusual when they were grown in the laboratory?

1 answer:

mote1985 [20]3 years ago

8 0

The HeLa cells were originally cancer cells that were sampled when doctors tried to treat the cancer. Later they found that those cells never died, but continued to grow. That is there main purpose in research because they are an immortal strain. They became a very powerful tool in cancer research.

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Where does the exchange of oxygen (from the air) with carbon dioxide (from the cells) take place?

Katen [24]

Answer:

The Answer is Option D. 

Exchange of respiratory gases, oxygen and carbon dioxide take place in the alveoli of the lungs. Oxygen which is inhaled from the atmosphere diffuses through the walls of the alveoli and reaches to the adjacent capillaries into the red blood cells.

8 0

2 years ago

Read 2 more answers

Which of the following characteristics, structures, or processes is common to both bacteria and viruses?

Svetlanka [38]

C is the most appropriate one.

5 0

3 years ago

You have a 15kb plasmid. EcoRI cuts the plasmid into 7kb and 8kb pieces, and BamHI cuts the plasmid into 1kb and 14kb pieces. If

Harman [31]

Answer:

a. Bands at 1kb, 6kb and 8kb

Explanation:

The EcoRI and BamHI are the restriction enzymes which cut the DNA sequence especially a plasmid at specific sites called the restriction sites.

The restriction enzymes produces bands of specific length therefore these restriction enzymes are used to estimate the approximate length of the DNA.

In the given question, the

1. EcoRI- produces two strands of 7 kb and 8 kb

2. BamHI- produces two strands of 1kb and 14kb

This shows that the length of DNA sequence is 15kb

But when the DNA strand are digested with both the enzymes simultaneously then it will produce three bands as:

i) 14 kb can be broken down in 2 bands of 6 kb and 8 kb

ii) 1 kb band is already produced by the Bam HI.

This shows that 1+6+8= 15 kb

Thus, Option-A is correct.

5 0

3 years ago

In the BOREAS study, scientists are trying to determine if a large amount of carbon is being taken in by what biome? a. rainfore

belka [17]

Boreal forest  is a large amount of carbon is being taken in by Biome

Answer: C. Boreal forest

Explanation:

BOREAS is the investigation completed in the boreal woodland at Canada that spotlights on improving our comprehension of the radiant energy, heat, water, carbon dioxide and gases between the boreal forest and the environment.

An essential goal of BOREAS was to gather the information expected to improve the models of computer simulation of the significant procedures controlling these exchanges with the goal that researchers can envision the impacts of worldwide change on the biome.

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3 years ago

The three stages of cellular respiration are glycolysis Krebs cycle and the electron transport chain when do cells exhibit all t

statuscvo [17]

They exhibit all the stages when its the presence of oxygen only.

3 0

3 years ago