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Kryger [21]
3 years ago
13

What are the two most important processes in the cycling of oxygen in and out of the atmosphere

Biology
1 answer:
pshichka [43]3 years ago
3 0
The two most important processes is <span>weathering and erosion.
</span>
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Which of the following is true regarding cultivation and isolation of animal viruses? View Available Hint(s) Which of the follow
Studentka2010 [4]

completed question'

.....culturing viruses that requires a human host

Answer:

Diploid cell culture lines, developed from human embryos, are widely used for culturing viruses that require a human host

Explanation

Viruses can not thrive in a non-living host or artificial media.They  are intracelular parasites  which needed living host to replicate . Cultures lines from Human embryo  in are therefore used for culturing viruses of human host, so that its mode of replication and gene expression can be studied, and therefore its virulence can easily be studied.

This method have the advantage that;

1.there is no need to make use of the whole animal rather,on a tiny tissue needed can be isolated for culture.

2. the cells growth is continuous,and can be preserved in liquid Nitrogen and renew for future culture

3. cells can be grown in different containers,  with ability to decide the number of cells needed.

Temperature is kept at optimum for human in the culture at  37 degree centigrade, nutrients are provided, NaHC03 as buffers for C02, and  the medium is humidified.

3 0
3 years ago
Which advance in biology resulted from developments in cell technology?
Mariulka [41]

Answer:

Immortal cell line

Explanation:

An immortalised cell line is a population of cells from a multicellular organism which would normally not proliferate indefinitely but, due to mutation, have evaded normal cellular operation and instead can keep undergoing division. The cells can therefore be grown for prolonged periods in vitro

Immortal cell lines are a very important tool for research into the biochemistry and cell biology of multicellular organisms. Immortalised cell lines have also found uses in biotechnology.

4 0
4 years ago
Which of the following is true when an individual exhibits two identical recessive alleles?
neonofarm [45]

Answer:

A.the individual will be homozygous

Explanation:

5 0
4 years ago
Which of the following is true of folded mountains, fault-block mountains, and volcanic mountains? (2 points)
Annette [7]

Answer:

The answer is "form only at boundaries between two continental plates." :)

8 0
4 years ago
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Which is an example of a pioneer species?
hammer [34]

Answer:

lichen

Explanation:

Common examples of pioneer species include bacteria, lichen, mosses, and fungi.

3 0
2 years ago
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