What type of bond connects base pairs?
A. hydrogen
B. ionic
C. covalent
D. van der Waals
Ans: A. hydrogen
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Which of the following is a true statement about asexual reproduction in plants?
A) Clones of plants do not occur naturally. B) Cloning, although achieved in animals, has not been demonstrated in plants. C) Making cuttings of ornamental plants is a form of fragmentation. D) Reproduction of plants by cloning may be either sexual or asexual. E) Viable seeds can result from asexual reproduction only.
The term amphipathic describes the characteristic of some molecules that have ________.
A) two polar regions B) only a single polar region C) both a polar and a nonpolar region D) no polar regions E) two nonpolar regions
The stacks of thylakoids in a chloroplast are called
A. mesosomes. B. cristae. C. grana. D. stroma. E. packages.
Which of the following describe characteristics of sclerenchyma cells? Select all that apply.A) Their function is primarily to transport oxygen and carbon dioxide throughout the leaf.B) They have thick, tough secondary walls.C) Their secondary walls may be impregnated with lignin.D) They form fibers and sclereids.E) They lack living protoplasts when mature.
What will be an ideal response?