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OLga [1]
2 years ago
11

Blood passes through the left av valve as it moves from the _______ to the _______.

Biology
2 answers:
Tamiku [17]2 years ago
8 0

Answer:

left atrium; left ventricle

jarptica [38.1K]2 years ago
7 0

Answer:

The blood travels from the left atrium through the mitral (bicuspid) valve into the left ventricle.

Explanation: It is pumped out of the ventricle through the aortic valve into the aortic arch and throughout the systemic circulation.

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Which term refers to fibrous connective tissues that connect bone to bone and provide static and dynamic stability as well as in
Tom [10]

Answer:

Ligament

Explanation:

The ligament is a primary connective tissue which connects one bone to another bone in the skeletal system of humans. The ligaments are present is the ankles, knee, elbows and shoulders and in other joints.

The ligaments if broken cannot be regenerated and provides many functions like it provides guidance, input to the nervous system and provides stability to the bones and facilitates the movement.

Thus, Ligament is the correct answer.

5 0
3 years ago
Read 2 more answers
In science, an idea proposed as a possible explanation for something is called a(n) a. experiment b. theory c. law d. hypothesis
Ksenya-84 [330]

Answer:

D. Hypothesis.

Explanation:

A hypothesis is defined as an idea or explanation which can be further tested through study and experiments. It is a proposed explanation for a phenomenon.

Scientists generally base scientific hypotheses on previous observations that cannot be explained with the available scientific theories.

8 0
3 years ago
What function does recombination by crossing-over have in genetic variation?
Katena32 [7]

Answer: Crossing-over allows the genes that come from each parent to recombine before they are passed on to future generations because chromatids of homologous chromosomes mate and exchange sections of their DNA.

Explanation:

Chromosome crossing-over is the process by which chromatids of homologous chromosomes mate and exchange sections of their DNA during prophase I of meiosis, when pairs of homologous chromosomes, or of the same type, are aligned. The chromatids of the homologous chromosomes break off in the chiasmas and rejoin to allow recombination of the linked genes. So it occurs when regions at chromosome breaks mate and then reconnect to the other chromosome. <u>The result of this process is an exchange of genes, called genetic recombination</u>.

This allows the genes that come from each parent to recombine before they are passed on to future generations. Then, <u>it is an important source of genetic variability</u>, since it involves an exchange of segments between homologous chromosomes during the development of gametes. <u>This process allows that the descendants of an individual are genetically very different</u>, since it is very unlikely that an individual produces two equal gametes, because all of them have different segments of the homologous chromosomes.

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Important substances found in food, which promote growth and good health
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During protein synthesis the cell uses a
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During protein synthesis the cell uses information from messenger RNA
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