The material would be CaCO3.<span><span />
</span>
Answer:
A
Explanation:
they are associated with venous sinuses.this valve open one way flow of direction of the heart.
<span>Ethics are human's comfort and interest,it cannot protect the environment so it causes damages to the environment where people will be affected.Nowadays Ethics are implemented to meet the needs of the current generation but it will be dangerous to the future generation.So that environmental crisis demand a new ethics which want focus on economic and social development,protective and caring environment.</span>
Graduated cylinders are labeled with measurements, unlike test tubes and flasks, and they have smaller increments so they are more accurate than beakers should they be labeled. So D.
