Answer:
it's either the first answer or the last one
Explanation:
not quite sure
Depending on the environment the organism is living in it can adapt to better survive in its habitat. For example, creatures living underwater have gills allowing them to breathe easier, and have lights attatched to their head so they can see in the pitch blackness of the deep water.
Answer:
Hormones are controlled by a
(negative)
feedback system between the glands that produce this hormone and the concentration of blood calcium ions. If the level of ions is
(low)
,hormone secretion is increased. This causes resorption by cells called
which releases both calcium and phosphate ions into the blood stream.
Explanation:
Negative Feedback a the process in your body that helps to maintain Homeostasis. If some variable changes a value in your body, like your ion levels, your glands produce a hormone that causes resorption by cells. This releases both calcium and phosphate ions into the blood stream and therefore your ion levels go back to normal.
Hope this helps!