Most of the protein eaten by the mother during the third trimester of pregnancy is used for fetal brain and
____________________ system growth and development Fill in the blank(s) with the appropriate word(s).
nervous
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Of the following molecules, which passes through a lipid bilayer most readily?
A. carbon dioxide B. glucose C. K+ D. arginine E. RNA
Represented by only one living genus, Equisetum, these seedless vascular plants have leaves in whorls
around a photosynthetic stem that is stiff and gritty because they accumulate silica in their tissues
a. mosses b. whisk ferns c. ferns d. club mosses e. horsetails
The molecule that carries amino acids during translation is ____
a. DNA b. rRNA c. mRNA d. tRNA e. RNA polymerase
Mutant forms of tumor-suppressor genes act _____; both copies of the gene must be _______ before their protective function is lost.
a) as dominant Mendelian traits, mutated or deleted b) recessively, mutated or deleted c) recessively, preserved d) as dominant Mendelian traits, preserved