According to the endosymbiont hypothesis,
a. most of the genes from the endocytosized bacteria moved to the nucleus.
b. the host anaerobe became dependent on the endocytosized bacteria.
c. the endocytosized bacteria became dependent on the host cell.
d. the endocytosized bacteria were all photosynthetic.
e. most of the genes from the endocytosized bacteria moved to the nucleus, the host anaerobe
became dependent on the endocytosized bacteria, and the endocytosized bacteria became
dependent on the host cell.
E
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Endothermic animals use the majority of their energy to
a. digest. b. grow. c. move. d. reproduce. e. stay warm.
Which of the following statements about embryonic development is NOT true?
A. A zygote undergoes cleavage, which increases the cell number, but not the volume of the egg cytoplasm. B. A primitive gut is also referred to as an archenteron. C. A blastopore is the opening into the primitive gut formed by gastrulation. D. A blastocoel is the fluid-filled cavity of a blastula. E. The primitive streak occurs in the morula stage of the embryonic development.
Which portion of the accompanying figure would be connected to the oval window of the cochlea?
a. 1
b. 2
c. 3
d. 6
e. 8
In some species of sharks, babies hatch from shells within their mother's body. What is this behaviour an example of?
a. oviparity b. viviparity c. ovoviviparity d. budding