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Lina20 [59]
3 years ago
10

Which sentence best explains how a unicellular organism gets nutrients?

Biology
2 answers:
pochemuha3 years ago
7 0

Answer:

A

Explanation:

I guessed and that was the right answer

andreev551 [17]3 years ago
4 0

Answer:

A

Explanation:

A P E X

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Digestion takes place inside vacuoles containing?
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Digestion takes place inside Iysosomes containing digestive enzymes. Hope I helped!
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____________ is the process of taking material into the cell by means of infoldings of the cell membrane. A) Diffusion B) Endocy
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B. Endocytosis is the correct answer
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Which of the following is not a part of environmental science? a. interactions of organisms and the environment b. human impact
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To investigate the possible presence of introns in three newly discovered genes (X, Y, and Z), you perform an experiment in whic
REY [17]

Answer:

a). At least one intron must be present in gene X.

b). At least two intron must be present in gene Y

c). It is impossible to determine whether there are any introns in gene Z.

Explanation:

Introns may be defined as the segments in the RNA molecule or the DNA molecule that does not code for proteins and they interrupts the sequences of each of the molecules.

In the context, we get :

a). In the gene X, at least one of the intron is present. Sometimes more than one introns may also be present. Due to slicing, we get one band less in the cDNA which is made from the mRNA.

b). In dene Y, at least one intron is present. Sometimes more than one introns are present inside the gene Y. In this case we get two bands less in the gene due to slicing.

c). In gene Z, it is not possible to determine the number of introns present in them. In genes X and Y, the Haelll enzyme is present in the intron. Therefore we get less of band after splicing the mRNA to cDNA.

6 0
3 years ago
Describe the principle of MPN for enumerating bacteria from a natural sample.
KengaRu [80]

Answer:

MNP stands for the most probable number which is used for finding out the concentration of viable bacteria in a sample. It is commonly used to check the quality of water and its safety. Usually, the presence of fecal coliform bacteria is checked in this test.  

Principle of MNP: The sample which is to be tested is diluted serially and then inoculated into a broth medium containing lactose. If coliforms are present in the tube than it will consume lactose and release acid and gas.

Color change represents acid production and gas trapped in the Durham tube represents the gas production by bacteria. Then the number of tubes at each dilution that showed positive results are compared with standards to determine the most probable number of the bacteria.

5 0
4 years ago
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