A small number of species that are abundant in a given community are called:
A) community species. B) ecological dominants.
C) keystone species. D) dominant species.
Answer: B
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True or False: Ecdysozoans include insects and make up more than half of all known animal species
A. true B. false
Chloroplasts share many similarities with which one of the following organelles?
a. mitochondria b. rough endoplasmic reticulum c. nucleus d. Golgi complex e. lysosome
Which of the following is used during the fight-orflight
response? a. sympathetic nervous system b. parasympathetic nervous system c. norepinephrine d. sympathetic nervous system and norepinephrine e. parasympathetic nervous system and norepinephrine
Clonal selection
A) determines the pool of mature leukocytes that will be stimulated by macrophages. B) requires the activation of natural killer cells. C) describes the proliferation of B and T lymphocytes after they have been activated by an antigen. D) requires the presence and activation of complement.