What conclusion can you draw from the figure above?
A) Without direct contact, mussels can sense the presence of crabs.
B) Mussels can sense the presence of crabs only visually.
C) Mussels are increasing their shell thickness in response to water current.
D) Shell thickness is a non-inducible defense.
E) Crabs hunt for mussels by focusing on the chemicals they emit into the water.
Answer: A
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Which of the following are arranged in the sequence in which the various taxa first appeared in time?
A. bacteria, protists, liverworts, lycophytes, streptophytes, angiosperms, gnetophytes. B. prokaryotes, protists, mosses, streptophytes, conifers, ferns, angiosperms. C. bacteria, streptophytes, protists, mosses, angiosperms, cycads. D. protists, prokaryotes, streptophytes, ferns, mosses, angiosperms, conifers. E. prokaryotes, protists, streptophytes, mosses, ferns, conifers, angiosperms.
What is the tendency of water molecules to stick together?
A) cohesion B) adhesion C) tension D) transpiration
One significant difference between anthropoids and other primates is the size of their:a
legs. b. arms. c. brains. d. spine. e. feet
The viruses that can infect bacterial cells are
A. cold viruses. B. HIV virus strains. C. influenza viruses. D. bacteriophages.