Which one of the following statements about intracellular transport is true?
A. Microtubules and microfilaments facilitate
cellular movement, but intermediate filaments
do not.
B. Microtubules and intermediate filaments
facilitate cellular movement, but
microfilaments do not.
C. Intermediate filaments and microfilaments
facilitate cellular movement, but microtubules
do not.
D. Intermediate filaments, microfilaments,
and microtubules all facilitate cellular
movement of one kind or another.
A
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Scientists are attempting to genetically modify rice so that it will not incorporate ____ into the grains
a. arsenic b. methylmercury c. chelated iron d. lead e. uranium hexafluoride
Molecular data suggest that mosses, hornworts, and liverworts have individual lines of descent, but that they form a monophyletic group.
Answer the following statement true (T) or false (F)
Why has the diverse group of protists traditionally been grouped together?
a. They all have the same type of nutrition. b. They are not prokaryotes, fungi, plants, or animals. c. They all have very similar shapes. d. They all have very similar DNA sequences
The macrolide, ________, is a useful substitute for dealing with penicillin-resistant Streptococci.
Fill in the blank(s) with the appropriate word(s).