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Darina [25.2K]
2 years ago
6

What are antibiotics and how and why do they work?

Biology
1 answer:
netineya [11]2 years ago
5 0

Answer:

Antibiotics are medicines that help stop infections caused by bacteria. They do this by killing the bacteria or by keeping them from copying themselves or reproducing. The word antibiotic means “against life.” Any drug that kills germs in your body is technically an antibiotic.

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Animal cells contain all of the following structures EXCEPT a A) nucleus. B) cell wall. C) mitochondria. D) Golgi apparatus.
tankabanditka [31]
<span>The answer is B) cell wall. The cell wall is a structure important cell protection and shape. It is necessary for the survival of unicellular organisms, such as Archaea and bacteria. Plants, some fungi, and algae also have cell walls with major function in structural support and protection against environmental conditions and infection. However, animal cells do not have cell walls.</span>
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3 years ago
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You are conducting a twin study to estimate the heritability of a particular trait and have found that monozygotic twins have a
iogann1982 [59]

Answer:

The correct answer is "high heritability".

Explanation:

Concordance, is a term used in genetics to describe the probability that one of the twins have certain trait if his brother certainly has it. A high percentage of concordance, such as 75%, is translated into high heritability since monozygotic twins have identical genomic sequences. Additional information to determine heritability will be to study the exposure to similar environmental conditions, since environment can also affect the presence of certain traits.

4 0
2 years ago
Put the following steps of using the process of gel electrophoresis in order.
erik [133]
The answer is
1,4,2,3
3 0
3 years ago
Which of the following explains the process of evolution?
slava [35]

Answer:

A process of change in a population through genetic variation.

Explanation:

Evolution is the process of change in heritable characteristics of populations of organisms over several generations as it allow natural selection in it.

Genetic variation which refers to differences in gene frequencies is an important force in evolution which relies of natural selection to cause an increase or reduce gene frequencies in a population. Evolution lead to changes in genetic material of populations over time which make them to develop genes that will allow them to adapt to their environment for survival and reproduction.

5 0
3 years ago
"Give me half a tanker of iron," he joked, "and I'll give you the next ice age." Explain this quote from Martin s original artic
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Though this is a joke, it's based on the scientific experiment Martin was about to conduct before he passed away- the hypotheses is that if you dump enough iron fillings into the ocean, it will spur the growth of the P<span>hytoplankton (of which would take in the CO2) and could possibly lead to a global cooling.</span>
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