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Tcecarenko [31]
3 years ago
6

Which best explains the circulation system within mammals?

Biology
1 answer:
natka813 [3]3 years ago
3 0
<span>A. Mammals use a closed, double-loop circulatory system aided by a four-chambered hearts.

The four chambered heart of a mammal is divided into two atria and two ventricles. Double-loop circulatory system is used. One loop for oxygenated blood, the other loop for deoxygenated blood.</span>
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Bone marrow is the soft connective tissue of bone that includes red bone marrow and yellow bone marrow. Red bone marrow is _____
Sever21 [200]

Answer:

Bone marrow is the soft connective tissue of bone that includes red bone marrow and yellow bone marrow. Red bone marrow is <u>heteroglobic</u> (blood cell forming) and contains <u>redactive</u> connective tissue, immature blood cells, and fat.

In children, red bone marrow is located in the <u>cyclonic</u> bone of most of the bones in the body as well as the <u>antebellum</u> of long bones. Much of the red bone marrow degenerates and turns into yellow bone marrow as children mature into adults. As a result, adults have red bone marrow only in selected portions of the <u>irregular</u> skeleton. Some of these include the <u>dismantled</u> bones of the skull, the vertebrae, the ribs, the sternum, and the hip bones.

8 0
3 years ago
DNA extraction is a useful technique for scientists because it can be used _____. A. to see the nuclei of cells B. to absorb vir
ra1l [238]

DNA comprises the genetic makeup of every organism. It carries genetic information that is used by the organs in the body to determine what functions to carry out.


DNA cannot be used to see the nuclei of cells or absorb viruses. A person's personality cannot be determined from DNA.


The answer is D. to determine if people are related, as DNA between two people can be compared for similarities of code between the two.

8 0
3 years ago
In water snakes, body color is controlled by two alleles that display incomplete dominance. Snakes with the BB genotype are brow
Rainbow [258]

Answer:

Phenotypic ratio= 1 Brown : 1 Gray

Explanation:

Genotype of brown snake= BB

genotype of gray snake= Bb

A cross between brown (BB) and gray (Bb) snake obtains progeny in following phenotypic ratio= 1 Brown : 1 Gray

Here, the heterozygous parent, gray snake (Bb) forms two types of gametes in 1:1 ratio while the homozygous dominant parent, brown snake (BB) forms only one type of gamete.

4 0
3 years ago
The element has. protons and neutrons<br><br>​
Andrews [41]

Answer:

electrons

Explanation:

5 0
3 years ago
Read 2 more answers
Can someone Help me with this please
Harrizon [31]

Answer:

Explanation:

1> Because meat is more calorically dense than vegetables

2>Sunlight is necessary for plants to grow, and to provide energy to warm the earth's atmosphere. Light intensity controls plant growth. Light duration affects plant flowering and animal/insect habits.

3> The pyramid of biomass can be upright or inverted, but pyramid of energy is always upright.

4 0
3 years ago
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