The gametophyte generation of ferns is called the:a
prothallus.
b. protonema.
c. gemma.
d. thallus.
e. fiddlehead.
A
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Based on your knowledge of the chemistry of the cell membrane, which of the following compounds would you couple with a new drug in order to achieve better uptake by cells?
A) carbohydrates B) polar amino acids C) lipids D) several mannose-6-phosphate monomers E) any hydrophilic substance
Homologous chromosomes pair with each other during meiosis, but are misaligned. What is the likely outcome if crossing over occurs?
A. One daughter chromosome contains a gene duplication, the other three are normal. B. One daughter chromosome contains a gene deletion, the other three are normal. C. Two daughter chromosomes contain a gene duplication, the other two are normal. D. Two daughter chromosomes contain a gene deletion, the other two are normal. E. One daughter chromosome contains a gene duplication, one contains a gene deletion, and the remaining two are normal.
Within the vestibular system of vertebrates, hair cells help detect movement when their cilia are bent by
A. otoliths. B. statoliths. C. the tectorial membrane. D. the basilar membrane. E. gravity.
In support of the Recent Africa Origin hypothesis, the oldest dated fossils of H. sapiens found in Africa are reliably
dated at 100,000 years old. ____________________ Indicate whether the statement is true or false.