Answer:
the number of protons in an atom
The correct answer choice would be B. 4 acetyl CoA enter the citric acid cycle.
The right answer is C. thermoregulation and hormone transport.
The cardiovascular system has the function of distributing the blood to the organs.
Blood is a red and slightly viscous liquid that circulates in the blood vessels, propelled by the heart, is essential to the maintenance of life. It transports nutrients, oxygen and hormones to the cells of the body, and rids them of their waste.
Blood circulation helps control body temperature and regulates the volume of certain liquids in the tissues. In addition, the blood carries white blood cells, which defend our body against germs.
The embryonic stem in a seed is the plumule.
it grows out of the hypocotyl, which that itself grows out of the radical, which is attached to the microphyl, feeds on the cotyledon, is fertilized by the endosperm, and is all protected by a hard seed coat :)
