The blastocyst begins to form a second hollow cavity that will eventually become the
A) placenta.
B) fundus.
C) amniotic cavity.
D) embryonic disk.
E) embryo.
C
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What is the most significant advantage of using RNAi to study development?
A) Geneticists have only been able to identify a subset of the genes involved in development. B) Genetic studies of a single gene can be completed without creating new mutant organisms. C) RNA is easy to isolate. D) RNAi causes phenotypes not typical of in vivo development.
In what way are fungi similar to animals?
A) Both take in food from the outside. B) Both produce hair-like hyphae. C) Both form embryos when they reproduce. D) Both produce antibiotics.
A morula is a solid ball of undifferentiated cells
Indicate whether the statement is true or false
The domain Archaea includes prokaryotes that are
A) endospore formers. B) intracellular parasites. C) members of the deeply branching bacteria. D) human pathogens. E) hyperthermophiles.