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zzz [600]
3 years ago
10

URGENT!!! Why do identical twins have the same set of genes?

Biology
2 answers:
Gnom [1K]3 years ago
7 0

Answer: 3. They were born of one fertilized ovum.

Explanation: A zygote is formed

when an egg is fertilized by a sperm. The zygote then undergoes a mitotic division into two and each half will further develop into a separate embryo. The two embryos formed will develop into identical twins.

Alborosie3 years ago
5 0

Answer:

They were born of the one fertilized ovum

Explanation:

Referenced in this statement: "As a result, no two persons are exact genetic duplicates, with the exception of identical twins. Identical twins are the products of the same fertilized egg and have identical genes. Even identical twins may appear and behave differently as a result of varying environmental factors in their lives."

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How does a newborn animal know exactly what to do the moment its born
Svetradugi [14.3K]
A baby animal knows what to do after birth just from natural instinct. Human babies do not get taught how to breath or cry, they know to do so because they would die otherwise.
8 0
3 years ago
Why are antibiotics effective in curing diseases against some pathogens but not others?
Leya [2.2K]

Answer:

The correct answer is "I, II, and III".

Explanation:

The missing options of this question are:

I only

II only

III only

I, II, and III

The correct answer is "I, II, and III".

Antibiotics are of different spectrums of activity depending on the number of pathogens they can kill. They are different reasons for this differences in antibiotic specificity:

I. Antibiotics interrupt processes found in some but not all pathogen cells. For instance, some antibiotics are directed to cell walls that not all bacteria posses.

II. Some pathogens have no metabolic processes to interrupt. The antibiotics that are directed to metabolic reactions of bacteria are not effective in treating viruses because they do not perform this metabolic reactions.

III. Some pathogens have developed genetic resistance to specific antibiotics. Bacteria have a remarkable genetic plasticity having plasmids that can be easily transmitted among them, which give them antibiotic resistance.

7 0
3 years ago
2. Nitrogen, as it is found in the ATMOSPHERE, can be used by plants and
irina1246 [14]

Answer:

false

Explanation:

Although the majority of the air we breathe is N2, most of the nitrogen in the atmosphere is unavailable for use by organisms. This is because the strong triple bond between the N atoms in N2 molecules makes it relatively unreactive. However organisms need reactive nitrogen to be able to incorporate it into cells.

8 0
3 years ago
Finches that live in an isolated area with limited access to seeds and water is an example of what mechanism in Darwin's theory
Brums [2.3K]

Answer:

c. Limits on population growth

Explanation:

Darwin was heavily influenced by Malthusian theory of how population growth was influenced by growth limits. For Darwin, the population growth of species of living beings would be influenced by the limits imposed by the environment in which these species live, through the amounts of natural resources available to the population.

Thus, Darwin concludes that when the environment allowed an abundance of natural resources, such as water and food, the population of living beings would tend to grow more, however, when natural resources are limited, the population would grow less. This is called "population growth limits".

An example of this can be seen in the question above, where finches that live in an isolated area have limited access to seeds and water.

4 0
3 years ago
Please help
leva [86]
I believe it that the answer is C. Hope this helps
3 0
2 years ago
Read 2 more answers
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