Coelomates are:
A. two embryos that develop in the same coelom
B. animals that have a true coelom
C. animals that have two coeloms
D. animals that have no coelom
E. animals in which the coelom disappears at gastrulation
B. animals that have a true coelom
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The study of learning has been considerably advanced through studies of the California sea slug Aplysia. Which of the following is NOT a reason Aplysia is well suited to these studies?
A. It has a simple nervous system with only about 20,000 cells. B. Some of its neurons are very large, enabling the insertion of electrodes for recording. C. Some of its neurons are very large, enabling the injection of dyes that allowed tracing the paths and connections of these neurons. D. The large size of some neurons allowed isolation of proteins and mRNAs from these neurons. E. All of the choices for this question are correct.
The flukes and tapeworms are covered by a protective
a. cuticle. b. shell. c. scales. d. slime layer.
Of the following plastids, which is not paired with its proper function?
A) amyloplasts; sugar synthesis B) chromoplasts; contain non-chlorophyll pigment that give flowers distinctive colors C) chloroplasts; photosynthesis D) proteinoplasts; protein storage E) elaioplasts; lipid storage
When doing SSU (small subunit ribosomal RNA) of a mixed population of microbes from an environmental sample, specific ________ are identified.
A. genotypes B. phylotypes C. phenotypes D. unknown microbes