The structure labeled "B" is the ____
a. right ventricle
b. right atrium
c. left atrium
d. left ventricle
e. superior vena cava
ANSWER: b
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Transcriptionally active chromatin tends to:
A. be devoid of nucleosomes. B. be deficient in histone H1. C. contain sites hypersensitive to in vitro treatment with DNase I. D. All of the choices are true for transcriptionally active chromatin.
Which of the following is TRUE of a morphogen? It is a signaling molecule that
A. is required for cell-to-cell contact within the embryo. B. induces the differentiation of cells within the embryo. C. induces blastulation of the developing embryo. D. induces implantation of the embryo into the uterus of mammals. E. that separates out cytoplasmic factors to their respective cells within the developing embryo.
Most of the plant body is composed of ____
a. dermal tissue b. root tissue c. ground tissue d. vascular tissue
e. cork tissueThe ________ generation of a plant is diploid
Fill in the blank(s) with correct word