Cells directly beneath the shoot apical meristem begin to elongate and form the stem. Which of the following events or structures contribute to the elongation of these cells? Select all correct choices
A. the formation of a large vacuole in these
cells
B. the presence of cellulose microfibrils in
these cells
C. the presence of meristem identity genes in
these cells
D. the loss of cytoplasm from these cells
A,B
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What type of plants are usually seedless?
A. Aneuploid B. Diploid C. Triploid D. Tetraploid
Which of the following organisms is not an
arachnid?
a. spider b. scorpion c. tick d. ant e. mite
Which of the following is a true statement about experimentation?
A) Variables in an experiment cannot be manipulated by the researcher. B) Some hypotheses cannot be tested by experimentation. C) Experimentation should test at least two or more hypotheses at the same time. D) True randomization of subjects is impossible during experimentation.
Mycorrhizae, specialized symbiotic associations between the roots of plants and fungi, are characteristic of
A. all plants. B. about 60% of all plants. C. about 40% of all plants. D. about 90% of all plants. E. about 20% of all plants.