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weeeeeb [17]
3 years ago
6

Why do birds and humans have a 4 chambered heart

Biology
2 answers:
Basile [38]3 years ago
3 0

Explanation:

so there blood can go in and out of there arteries and ventricles

anygoal [31]3 years ago
3 0

Answer:

Explanation:

Because the 4 chambered heart prevents the mixing of oxygenated blood from the lung and deoxygenated blood from the body. However, In 3 chambered heart , both oxygenated and deoxygenated blood gets mixed.

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Suppose a human blood cell containing a 0.9 percent solute concentration were put into a container of 0 percent solute solution
Vladimir [108]

Answer and explanation:

If a human blood cell with a 0.9% solute concentration were to be put into a container of 0% solute solution, the cell would get BIGGER.

<u>The cell contains a </u><u>more concentrated solution</u><u> than the solution in the container</u>. The difference in concentration would produce an <em>osmotic gradient</em> that would cause water from the container to get inside the cell to even the concentrations - this is going to make the cell much bigger because the entering water would bloat the cell.

In this example, the solution in the container is hypotonic in relation to the cell, while the solution inside the cell is hypertonic in relation to the solution in the container. This is why the water will be moving from outside of the cell to the inside of the cell.

6 0
3 years ago
A change in the sequence of nitrogen<br> bases in a gene is called a(n)
Gnesinka [82]

Answer:

mutation

Explanation:

A mutation is a change that occurs in copying a DNA sequence where the order of the proteins could be altered.

3 0
3 years ago
Read 2 more answers
Relate the levels of organization to each other and to the whole system
egoroff_w [7]

Answer:

Every living organism starts with a cell which is the fundamental units of life, an organism could be unicellular or multicellular depending on the complexity. The aggregation of cells forms tissue, the tissue makes the organ while the organ makes the entire system which forms the entire living organism.

Explanation:

cell

tissue

organ

system

7 0
3 years ago
Why does a sickle shaped red blood cell cause trouble when a normal round red blood cell doesn’t?
Sladkaya [172]

Sickle cell anemia is an inherited form of anemia — a condition in which there aren't enough healthy red blood cells to carry adequate oxygen throughout your body. ... These irregularly shaped cells can get stuck in small blood vessels, which can slow or block blood flow and oxygen to parts of the body

from google

8 0
3 years ago
If two parents who blood types are both b produce a child that has blood type o what can you say about the parents genotypes
Leto [7]

Then, we can say the genotype of both the parents was heteroxenous... It is because, o is recessive and can dominant only in presence of other recessive gene.

So, both parents blood group genotype would be: Ib Io

7 0
3 years ago
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