<h3><u>Answer;</u></h3>
A. Gas exchanges takes place by diffusion.
B. It is an open system.
<h3><u>Explanation</u>;</h3>
- Most molluscs and arthropods have an open type of circulatory system.
- Open circulatory systems pump blood into a hemocoel with the blood diffusing back to the circulatory system between cells.
- Blood is pumped by a heart into the body cavities, where tissues are surrounded by the blood.
D. A change in the amount of polar ice will alter how ocean currents move
A. Evolution is a scientific theory, and scientific theories have many hypothesis and experiments that support their findings.
There are two broad classes of seismic waves: body waves and surface waves. Body waves travel within the body of Earth. They include P, or primary, waves and S, or secondary, waves. P waves cause the ground to compress and expand, that is, to move back and forth, in the direction of travel.
Maya is pregnant and the doctor should tell her about the
condition of preeclampsia that this condition <span>can affect other
organs in the mother's body. It can cause kidney damage, liver failure,
neurological symptoms, such as severe headaches, seizures, and fluid on the
lungs and the reason behind this is may be a substance released from placenta.
And due to this the fetus may not get the nourishment and oxygen it needs for
growth. </span>
