When the trunk or limb of a tree provides the substrate on which an epiphytic orchid grows, the arrangement benefits the orchid, which gets nutrients from the air and moisture from aerial roots, while the tree is unaffected
The relationship is referred to as A) amensalism.
B) commensalism.
C) competition.
D) parasitoidism.
B
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Reptiles are better adapted to life on land than are amphibians. Which of the following statements best describes their advantage?
A. Reptiles have an egg with an amnion, yolk sac, allantois, chorion, and shell. B. Reptiles have a skin that resists loss of water by evaporation. C. Reptiles breathe by expanding the rib cage. D. Reptiles have the ability to concentrate urine. E. All the other choices provided are correct.
Oligotrophic lakes are characterized by all EXCEPT
which of the following? a. deep water b. steep banks c. abundant oxygen d. low nutrient content e. high biomass in the profundal
Gametophyte generations produce ________.
Fill in the blank(s) with the appropriate word(s).
What is the term for learning that occurs only during a brief period early in life and results in a behavior that is difficult to modify.
A. Filial imprinting B. Instinct C. Imprinting D. Operant conditioning E. Innate behavior