You treat a sample of DNA with DNase and run the digested fragments out on an electrophoretic gel. You found mostly long fragments. What can you conclude about this sample of DNA?
A) The sample contains mostly euchromatin.
B) The sample contains relatively few histone proteins.
C) The sample contains mostly heterochromatin.
D) The DNA is from yeast cells.
E) The sample likely represents actively transcribed genes.
D) The DNA is from yeast cells.
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The work of Gregor Mendel provided an answer to two prevailing hypotheses popular at the time. What were these two hypotheses?
A) Mitosis is only typical in vertebrates. Meiosis is only typical in invertebrates. B) The two major hypotheses of the time were blending inheritance and inheritance of acquired characteristics. C) Animals use one set of rules for inheritance, while plants use a different set. D) Peas and other domestic plants are unsuited for studies of inheritance, but wild plants are perfectly suited. E) Self-fertilization is the rule in plants, while cross-fertilization is the rule in animals.
A pollen grain is best described as a ____
a. female spore b. female gametophyte c. male gametophyte d. male sporophyte e. female sporophyte
Each pollen grain produces two cells, one of which may develop into:a
a polar nucleus. b. a pollen tube. c. an anther. d. a compound pistil. e. a filament.
Which of the following fungi/phylum associations is incorrect?
A. morel mushroom / Ascomycota B. cup fungus / Glomeromycota C. Chytriomyces / Chytridiomycota D. button mushrooms / Basidiomycota E. black bread mold / Zygomycota