Which cell junction type creates a barrier between two cells?
a. anchoring junctions only
b. gap junctions only
c. tight junctions only
d. both anchoring junctions and gap junctions
e. both anchoring junctions, tight junctions and gap junctions
ANSWER: c
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Figure 23.2 in your text represents a phylogenetic tree of the vertebrate animals. According to this tree, what is the sister group to the tetrapods?
A. sauropsids B. mammals C. lungfish D. amphibians E. coelacanths Answer Point Value: 1.0 points Answer Key: C 5 Reference: Ref 23-1 According to Figure 23.2 in your text, what is the sister group to mammals? A. sauropsids B. tetrapods C. birds D. crocodiles and alligators E. birds plus crocodiles and alligators
Carnivorous plants like Sarracenia purpurea are which of the following?
A. detritivores B. producers and consumers C. producers D. consumers E. producers and detritivores
In addition to Homo, another genus within the hominins is
A) Cro-Magnon. B) Australopithecus. C) Lemur. D) Tarsius. E) Habilis.
Mycorrhizae are
A) commensal relationships between a fungus and the leaves of a land plant. B) symbiotic relationships between a fungus and the roots of a land plant. C) mutualistic relationships between a fungus and an alga. D) parasitic relationships between bacteria and the roots of a land plant. E) symbiotic relationships between bacteria and the roots of a land plant.