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creativ13 [48]
3 years ago
15

How are CO2 and O2 used or produced by orcas?

Biology
1 answer:
bagirrra123 [75]3 years ago
4 0

Answer:

basically every living thing breathes oxygen O2 and exhales carbon dioxide CO2

Explanation:

So orcas use O2 and produce then CO2.

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Before there was any life on earth, which gas was absent from earth’s ancient atmosphere? A. nitrogen B. ammonia C. oxygen D. me
maksim [4K]
Easy. Answer is oxygen because it says which one was missing before any life was on earth. And in order to have life on earth you need oxygen! 
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7 0
3 years ago
(Fill in the blank)
prisoha [69]

Answer:

Capsule

Explanation:

In many bacterial species, an extracellular layer composed of a polysaccharide especially a monosaccharide is produced around the cell wall of the bacteria. This extracellular layer is known as the slime layer or the capsule.

The capsule in bacteria serves many purposes like it protects the bacteria from the destruction by the white blood cell in the host, it enables the bacteria to adhere to the substrates and protect it.

In the plant group called the bryophytes also a capsule structure is present which grows in the sporophytic phase and encloses the spores, therefore, the capsule is considered the sporangium of the bryophytes.

Thus, the capsule is correct.

7 0
3 years ago
Which particle is used to determine the atomic number of an element?
Crank
The correct answer is "C". 'Proton'. The number of protons is equal to the atomic numbers.

I hope this helps!
8 0
3 years ago
Read 2 more answers
tructures used in recombinant DNA technology to carry the DNA from the cells of one species to the cells of another species are
Kobotan [32]

The process of fusing two or more DNA molecules to produce a hybrid is known as recombinant DNA. Restrictions endonucleases and ligases are two classes of enzymes that enable the technique.

When a restriction endonuclease detects a particular DNA sequence, it makes cuts inside or near that sequence. The recognition sequence of a restriction enzyme will haphazardly appear on every (1–4)n bases along a random DNA chain. The equation states how many fragments ends (measured in moles) are produced when a restriction enzyme cuts DNA.

Moles of DNA ends =2x(grams of DNA)/(number of bp)(660 g/mol / bp).

The equation describes how many ends are produced when circular DNA is digested by a restriction enzyme.

Mole ends=2x(moles DNA)x number of restriction sites.

The following equation can be used to determine how many ends are produced during the digestion of a linear molecule by a restriction endonuclease.

Mole ends=2x(molesDNA)number of restriction sites +[2x(moles of DNA)].

learn more about DNA brainly.com/question/2131506

#SPJ4

3 0
1 year ago
Tundra means “treeless land.” <br> True or False
earnstyle [38]
True, a vast, flat, treeless Arctic region of Europe, Asia, and North America in which the subsoil is permanently frozen.
3 0
3 years ago
Read 2 more answers
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