If you were observing a newly discovered animal and wanted to determine if it reproduces sexually or asexually, you could
A. perform genetic screening on the parents and offspring to see if the offspring are genetically identical to parents.
B. examine males to see if sperm can be produced.
C. try to observe mating behavior.
D. look carefully for nests with eggs.
E. None of the answer choices is correct.
A. perform genetic screening on the parents and offspring to see if the offspring are genetically identical to parents.
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Cardiac muscle cells
a. do not contract by a sliding filament mechanism. b. are similar to those of smooth muscle in being nonstriated. c. have fewer mitochondria than skeletal muscle cells do. d. possess numerous gap junctions on their sides, favoring rapid spread of excitation. e. have intercalated disks with tight junctions at their branching ends
Which postulate of natural selection is best supported by the work of Gregor Mendel?
a. Some individuals fail to survive and reproduce. b. Survival and reproduction are not determined by chance. c. Individuals in a population vary. d. Traits are passed from parent to offspring.
Dehydration synthesis is a common feature of polymer production in cells.
Answer the following statement true (T) or false (F)
Factors that contribute to difficulty in eliminating fungal infections via the body's defenses include
A. the capsules of some fungi resist phagocytosis. B. many fungi are resistant to cell mediated immune responses. C. many pathogenic fungi produce leukocidins. D. both resistance to phagocytosis and cell mediated immunity. E. many pathogenic fungi are resistant to the action of complement.