6. eons are the broadest category of geologic time, and we live in the phanerozoic eon. the
phanerozoic eon is further divided into eras. what divides the three eras of the phanerozoic
eon?
rams
o a. mass extinction events separate the three eras from each other.
o b. the first life on earth and the first multicellular life on earth separate the three eras from each
other.
o c. the appearance of carbon on earth and the appearance of atmospheric oxygen separate the
three eras from each other.
o d. the development of insects and the development of flying insects separate the three eras
from each other.

the growth of the plants is affected by the heat of the light. what is the student doing?

answer: the correct option is d. enzyme

lactase and carbonic anhydrase are the examples of enzymes.

lactase is an enzyme, which is present in the small intestine of mammals. it in the digestion of the disaccharide, lactose ( milk sugar) by converting it into two monosachharide, which are glucose and galactose.

carbonic anhydrase is present in the red blood cells. this enzyme plays significant role in the transport of co₂. it in the conversion of co₂ and h₂o into carbonic acid, which is then dissociated into bicarbonate ions and hydrogen ions.