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Vsevolod [243]
3 years ago
11

What is gas exchange?

Biology
2 answers:
photoshop1234 [79]3 years ago
8 0

Answer:

Gas exchange is the physical process by which gases move passively by diffusion across a surface. For example, this surface might be the air/water interface of a water body, the surface of a gas

Reika [66]3 years ago
5 0
Gas exchange is the process of absorbing inhaled atmospheric oxygen molecules into the bloodstream and offloading carbon dioxide from the bloodstream into the atmosphere. This process is completed in the lungs through the diffusion of gases from areas of high concentration to areas of low concentration.
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The polymerase chain reaction has revolutionized genetics because
sineoko [7]

Answer: All of these

Explanation:

The polymerase chain reaction (PCR) revolutionized the field of molecular biology because PCR uses a small amount of DNA as a template.Paired with two primers which side to the target sequence, nucleotides, and thermostable DNA polymerase amplifies a specific region of DNA. In this way a large amount of DNA is obtained from a very small sample.

7 0
3 years ago
A large female patient has fallen in a parking lot between two cars. she must be moved on the backboard to the waiting stretcher
goblinko [34]

Based on the given scenario, the best way to be used to promote the safest movement of the patient is that the four rescuers present should have each destined location on the patient where in, one of them should be on the head, the other at the feet, and the two should be on each of the side of the backboard.

3 0
3 years ago
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Which statement provides an example of epigenetics A. Genetic mutations arising every other generation B. Selective breeding of
irina [24]

Answer: d. mothering style affecting the developing brain

Explanation:

Epigenetics is the study of features or "phenotypes" which do not involve changes in the DNA sequence. Epigenetics is about how genes are expressed and used instead of the DNA sequence of the genes themselves.

The behaviour of a person's genes depends not only on the DNA sequence of the genes, but also on so-called epigenetic factors. Effects on genes from the external environment can affect disease, and some of these effects can be inherited in humans.

So, Mothering style which affects the brain development is an exampe of epigenetics which do not show any genetic feature.

Hence, the correct option is d.

6 0
2 years ago
A scientist constructs a graph to show the age structure of the human population of Country Y. The graph is shown here.
creativ13 [48]
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4 0
2 years ago
A __________
Paladinen [302]

Answer:

Substitution Mutations

Explanation: A substitution mutation occurs when specific bases (A, T, C or G) in a gene are swapped for different ones. This type of mutation doesn't cause a difference in the number of bases like insertion or deletion mutations do. Substitution mutations just switch out one or more bases for different ones.

Hope this helps :3

6 0
3 years ago
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