During early embryonic development, implantation into the uterine lining occurs at the ____ stage
a. zygote
b. morula
c. blastocyst
d. gastrula
e. hypoblast
ANSWER: c
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The eukaryotic transcription initiation complex is
_____ transcription of virtually all genes transcribed by RNA pol II requiring the same suite of general factors. _____ responsible for highly regulated transcription levels. _____ only associated with RNA polymerase I. _____ interactive with activators through DNA looping. _____ a basal factor associated with RNA pol II after positioning RNA pol II at the start site.
Antidiuretic hormone is produced in the
a. pons. b. medulla oblongata. c. hypothalamus. d. amygdala. e. pituitary gland
Which of the following has no part in today’s
concept of natural selection? a. inheritance of acquired characteristics b. competition for limited resources c. inherited variation d. overproduction of offspring e. survival of the best adapted
Identify the features unique to protostome development.
A. Coelom forms by a splitting of the mesoderm, the blastopore becomes the anus, and the cleavage is spiral. B. Coelom forms by a splitting of the mesoderm, the blastopore becomes the mouth, and the cleavage is spiral. C. Coelom forms by a splitting of the mesoderm, the blastopore becomes the mouth, and the cleavage is radial. D. None of the features listed are unique to the protostomes.