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Hotspot regions make up only 2 percent of the total land mass but contain what percentage of the world's endemic plant species?
Q6: If x and y have a positive
Q10: Non-flowing water ecosystems,such as ponds and lakes,are
Q17: Tropical _ refers to vegetation in the
Q32: Island biogeography theory predicts that a 10-fold
Q40: Tropical savannas typically lack trees or shrubs.
Q42: The reproductive strategy in which relatively few
Q44: Some nutrients are _ from the soil
Q49: The part of an animal's home range
Q51: The factors that influence the growth rate
Q53: Many plants use _ defenses,such as hairy