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arsen [322]
3 years ago
11

Which of the following describes the difference between nitrogen-14 and nitrogen-15?

Biology
1 answer:
Snowcat [4.5K]3 years ago
7 0

Some of these can easily be eliminated by knowing that both nitrogen 14 and nitrogen 15 are isotopes ( same element, with the same amount of protons, but with different numbers of neutrons) of nitrogen. So if the only difference between nitrogen 14, 15 , and regular nitrogen is the amount of neutrons...how many protons and electrons should both nitrogen 14 and 15 have? After thinking, you should be able to eliminate A, B,and C.
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Page No Date Sex in bacteria is deteaimined by ?<br>​
VladimirAG [237]

Answer:

Pili

Explanation:

The sex of bacteria is determined by a structure called Pilli. Pilli is not present in all species of bacteria, but within species that have this structure, such as Escherichia coli, pilli is considered an appendage present in male bacteria.

Pilli presents itself as a long hair and can also be called F factor or fertility factor and has a reproductive function, as it allows the conjunction between two bacteria (one with pili and the other without), where the male bacteria transmit genetic resources to within the body of the female bacteria , which will combine these resources with its own resources and will give rise to another bacteria.

3 0
3 years ago
PLEASE HELP ME ITS DUE TODAY PLEASE YOU DONT HAVE TO AWNSER THEM ALL
dybincka [34]

Answer:

1 = A

2 = B

3 =  B

Explanation:

1) Black holes occur when really big stars collapse on themselves. And, in order to get big, the star has to be an old one.

2) A black hole is something huge that swallows up everything, while a protostar is just the very beginning of a star.

3) Scientist can't truly know for sure, but they can infer about them due to the effects of the surrounding areas.

7 0
3 years ago
How long does it take for a package to come from uk to arizona?
Sunny_sXe [5.5K]
It depends most packages take 2-3 weeks so I’m guessing about 4 or 5?
4 0
3 years ago
Which organelles are found in plant cells but not in animal cells?
Valentin [98]

Answer:

Organelles that are found in plant cells, and not in animal cells, are chloroplasts, a call wall, specialized plastids, and a large central vacuole.

Hope you found this helpful <3

8 0
3 years ago
Read 2 more answers
Explain the term "Poly Inheritance" and give an example of a human trait that is controlled in such manner
Alenkasestr [34]

Answer:

Polygenic inheritance occurs when one characteristic is controlled by two or more genes. Often the genes are large in quantity but small in effect. Some examples include height, skin color, eye color and weight.

- In polygenic inheritance the "dominant" capital genes are additive, each capital gene adding one unit of color to the genotype.With more capital genes, the phenotype (appearance) gets darker.

6 0
3 years ago
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