The proposal that one type of organism can change gradually into another type over a long period of time is known as:
A. preconception.
B. preservation.
C. natural history.
D. evolution.
D
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Examine the figure above. Near a goose's abdomen, the countercurrent arrangement of the arterial and venous blood vessels causes the _____
A) temperature difference between the contents of the two sets of vessels to be minimized B) venous blood to be as cold near the abdomen as it is near the feet C) blood in the feet to be as warm as the blood in the abdomen D) temperature at the abdomen to be less than the temperature at the feet E) loss of the maximum possible amount of heat to the environment
The White Cliffs of Dover, a famous landmark in England, is made of limestone, which is really a collection of the pore-studded shells (tests) of
A. diatoms. B. dinoflagellates. C. brown algae. D. spirochetes. E. foraminifera.
The transpiration rate in plants is increased by
A. elevated temperature. B. wind. C. increased sunlight intensity. D. All of the choices increase the rate of transpiration.
Spallanzani's experiments contradicted the experiments of (Needham/Redi/Pasteur) on spontaneous generation
What will be an ideal response?