Answer:
A.
Explanation:
Humans used to use the appendix for good bacterial health in the gut. People used to drink dirty water and eat food that had lots of bacteria. The appendix would save them from infection.
Absorption it regulates the pH of the filtrate by exchanging hydrogen ions in the interstitium for bicarbonate ions in the filtrate; it is also responsible for secreting organic acids, such as creatinine and other bases, into the filtrate.
I hope this helps
Answer:The world's human population is growing at an exponential rate.
Explanation:
Humans have increased the world's carrying capacity through migration, agriculture, medical advances, and communication.
A microscope hope i helped
