D
C
Bryozoans are coral like sea nimals These organisms first appeared in the fossil record about 140 million years ago and remained relatively unchanged for 40 million years. Then they experienced a great diversification Which process does this illustrate
A.graduallism
B.extinction
C.fossil formation
D.punctuated equilibrium
D?
Assume that the evironment on one of the Galapagos Islands changes. How might this environmental change affect the finches there?
A. These finches may overproduce
B.These finches may no longer exhibit inherited variations
C. These finches may lose their adaptations
D.These finches may lack the adaptations needed to survive
D?
3 answers
Bryozoans are coral-like sea animals. These organisms first appeared in the fossil record about
140 million years ago and remained relatively unchanged for 40 million years. Then they experienced a great diversification. Which process does this illustrate?
140 million years ago and remained relatively unchanged for 40 million years. Then they experienced a great diversification. Which process does this illustrate?
Since the 1940s, chemical insecticides have been used to control insects in an effort to limit crop damage and the spread of insect-carried diseases. Chemical control efforts fail, however, when insect pests become resistant to insecticides. The increase in the number of insecticide-resistant insect species is mainly a result of
1 answer