Plant hormones _____
a. may have multiple effects c. are active in adult plants
b. are active in developing plant embryos d. are all of these
D
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What is the main difference between covalent and ionic bonds?
a. Ionic bonds share electrons between atoms, while covalent bonds transfer electrons between atoms. b. Covalent bonds share electrons between atoms, while ionic bonds transfer electrons between atoms. c. Ionic bonds form between hydrogen and other atoms, while covalent bonds do not use hydrogen. d. Covalent bonds form between hydrogen and other atoms, while ionic bonds do not use hydrogen.
In angiosperms, the megasporangium goes through several stages as it develops into an embryo sac. The sac protects the egg cell and several supporting cells, but it does not completely enclose it. What is the opening in the embryo sac that allows the pollen tube to enter called?
a. integument b. microspore c. micropyle d. exine
All crocodilians
a. live in or near water. b. are predators with sharp teeth. c. have a four-chambered heart. d. have powerful jaws. e. fit all of these descriptions
In the Schaffer-Fulton endospore stain, heat is a (fixation/mordant/staining) step.
Fill in the blank(s) with the appropriate word(s).