According to the graph from Figure 18.11 which complex trait shows very little influence from a genetic component?
A. autism
B. clinical depression
C. schizophrenia
D. male alcoholism
E. female alcoholism
E
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What features of charophytes provides evidence for charophytes being the closests relative to land plants?
A. Charophytes possess plasmodesmata. B. Charophytes are the only photosynthetic protists. C. Charophytes are fully terrestrial. D. Charophytes produce seeds and flowers.
When an organism has two different alleles at a gene locus, it is referred to as _____.
a. homozygous recessive b. homozygous dominant c. heterozygous
Which of the following is a potential advantage of introducing apomixis into hybrid crop species?
A) Cultivars would be better able to cope with a rapidly changing environment. B) They would have a larger potential genome than inbred crops. C) All of the desirable traits of the cultivar would be passed on to offspring. D) They would benefit from positive mutations in their DNA.
The "lub" heart sound represents
a. a heart murmur. b. closure of the AV valves. c. closure of the SL valves. d. hypertension. e. movement of actual heart muscle.