Answer:
This is true.
Explanation:
More commonly, an X chromosome will die and get replaced by a Y chromosome (all humans start off as females). When this occurs, the substitute Y chromosome causes changes in the zygote to occur; they begin developing male genitalia (i.e. penises, testicles, prostates, etc.).
E. systematic aorta
D. left ventricle
C. left atrium
A. pulmonary artery
B. superior venacava (i’m not sure if this one is right)
Answer:
The spleen
Explanation:
The spleen acts as a filter for blood by recycling old and defective red blood cells. It also stores red blood cells, platelets and white blood cells.
Passive is when the channels don't need energy to do so and active is when they need energy
Answer:
<u><em>a reliable source </em></u>
Explanation: