Multiple Choice
Which of the following was the most likely cause of the limited diversity of multicellular eukaryotes for much of their early existence?
A) High concentrations of oxygen
B) Frequent periods of heat
C) Frequent periods of cold
D) The existence of plankton
E) The lack of plankton
Correct Answer:
Verified
Correct Answer:
Verified
Q69: Refer to the figure, which illustrates a
Q70: The nonavian dinosaurs were one group among
Q71: The geological process of subduction (characterized by
Q72: During the most recent geological era, the
Q73: The period beginning with the Cambrian and
Q75: Which of the following represents a correct
Q76: Vascular plants first appeared during the _
Q77: The half-life of a particular radioactive isotope
Q78: Suppose life is found on another planet,
Q79: Life first evolved on Earth _ years