In North America, what is the greatest risk of warming to trees?
A) reduced growing season
B) reduced water availability
C) less variable precipitation
D) Most species live near their thermal maximum.
B
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Which of the following animals would have a placenta?
A. the marsupial mammal, opossum B. the platypus C. the rat D. the bullfrog E. a fish
Based on pollen morphology, it would appear that magnoliids are most closely related to ____
a. eudicots b. star anise group c. monocots d. water lilies e. gymnosperms
At one point in human development, tissue that connected the fingers and the hand appeared to be "webbed." Enzymes eventually destroy the cells of the webbing and the fingers separate. Where are these enzymes probably liberated from?
a. from the nucleus b. from the smooth endoplasmic reticulum c. from the chromosomes d. from the lysosomes
No cases of variant Creutzfeldt-Jakob syndrome linked to eating infected cows have occurred in the United States.
Answer the following statement true (T) or false (F)