Comb-jellies are similar to bilaterians in that they (select all that apply):
A. have a "flow-through" gut with both a
mouth and an anus.
B. develop muscle cells from a rudimentary
mesoderm.
C. have an anterior-posterior body axis.
D. use acetylcholine as a neurotransmitter.
E. none of these.
A,B,C,D
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An accurate and comprehensive description of pseudogenes must include
_____ Pseudogenes may have some gene-like features such as a promoter and splice sites. _____ Pseudogenes encode proteins, but the translated proteins are non-functional. _____ Pseudogenes can provide insight into the evolutionary history of the related functional gene. _____ Every pseudogene has a similar DNA sequence to some functional gene. _____ All pseudogene pretent to transcribe other genes when they only transcribe one type of genetic information.
Which brain region is most likely to contribute to the establishment of motor memory, the ability to perform complex
motor skills?
a. frontal cortex b. cerebellum c. hypothalamus d. amygdala e. brain stem
A fifteen-foot tree growing in a fence row is used as a fence post, to which barbed wire is stapled at a height of five feet. Years later, the tree is thirty feet high. The fence is
A. fifteen feet up because the tree doubled in height. B. approximately five feet up since a tree grows longer at the tips of its stem, branches, and roots. C. twenty feet up because it added fifteen feet to the original five-foot height. D. split because the trunk grew up but the bottom stayed at ground level. E. twenty feet up, still ten feet from the top of the tree.
Which of the following structures houses the corpus luteum?
a) ovary b) uterus c) vagina d) fallopian tube e) follicle