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laila [671]
3 years ago
13

Which one is better for delivering nutrients to the cells; the open circulatory system or the closed circulatory system? Why?

Biology
1 answer:
Dvinal [7]3 years ago
4 0

Answer:

closed circulatory system

Explanation:

The blood is pumped through a closed system of arteries, veins, and capillaries. ... Still, blood can flow backward and the system is only slightly more efficient than the open system of insects. The closed circulatory system has more advantages over the open circulatory system.

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2 years ago
Which organisms are likely to be found in the level labeled 4 in this diagram?
svetoff [14.1K]

Answer:wolf & owl

Explanation:

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3 0
3 years ago
Population genetics is the study of _______.
Mrrafil [7]

According to the research, the correct option is A, population genetics is the study of how allele frequencies in a population change over time.

<h3>What is population genetics?</h3>

It studies the origin, amount and distribution of genetic variability present in populations.

It explains the variation between individuals, as well as the dynamics of alleles and genotypes within and between populations.

Therefore, we can conclude that according to the research, the correct option is A, population genetics is the study of how allele frequencies in a population change over time.

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7 0
1 year ago
Select the correct answer. 30 POINTS!
QveST [7]

Answer:

B) snow

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3 0
3 years ago
The formation and action of angiotensin II can be summarized as follows: It is synthesized either when blood pressure is _______
krek1111 [17]

Answer:

low, sympathetic, an increase, decrease, pressure  

Explanation:

Angiotensin II is a peptide hormone whose primary function is to increase blood pressure by different mechanisms of action including vasoconstriction and sympathetic nervous stimulation. This hormone is produced by the action of the enzyme angiotensin-converting enzyme (ACE). Angiotensin II may act on the central nervous system (CNS) to increase antidiuretic hormone (ADH) levels, and on the arterial smooth muscle cells to trigger vasoconstriction. Angiotensin II induces the release of ADH and aldosterone hormones in order to increase blood pressure. When blood pressure returns to normal values, circulating Angiotensin II levels are decreased by negative feedback.

6 0
3 years ago
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