A sexually reproducing animal has two unlinked genes, one for head shape (H) and one for tail length (T). Its genotype is HhTt. Which of the following genotypes is possible in a gamete from this organism?
A) Hh
B) HhTt
C) T
D) HT
D
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Apoptosis is the process of
A. mitosis. B. the cell cycle. C. programmed cell death. D. programmed cellular reproduction. E. replication.
Bacteria with DNA described as having "hairpin ends with inverted repeats" must not have circular chromosomes.
Answer the following statement true (T) or false (F)
The discovery of extinct glyptodont fossils and their close resemblance to present-day armadillos led Darwin to make which of the following deductions?
a) All species remain unchanged b) Populations must grow faster than the available food supply. c) Conditions of the day were not suitable for the glyptodonts. d) The present-day armadillos were ancestors of the much larger glyptodonts. e) Extinction was part of the natural "circle of life".
Identify the principal role of photosynthesis
A) To convert solar energy into the chemical energy of sugars
B) To convert kinetic energy into the chemical energy of sugars
C) To convert the chemical energy of sugars into the chemical energy that fuels life's processes
D) To convert the chemical energy of sugars into heat to maintain an elevated body temperature