Which of the following is NOT true of the structures
labeled “D” in the figure?
a. They are haploid.
b. They will germinate to produce mycelia of
different mating strains.
c. They may fuse to produce a zygote.
d. They result from sexual reproduction.
e. They are spores.
Answer: c
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Of nearly 200 forms of hereditary deafness, 132 are autosomal recessive, 64 autosomal dominant, and 4 X-linked recessive. Hereditary deafness is therefore genetically
A) heterozygous. B) heterogeneous. C) heterogametic. D) heterosexual.
In “theory of evolution,” the word “theory” is used by the scientific community to mean which of the following?
a. a fact b. a hypothesis c. an idea d. an untested explanation
Dilation of a precapillary sphincter ____ blood flow through the capillary bed
Fill in the blank(s) with the appropriate word(s).
Which characteristic do birds share with mammals?
A) A single ovary in females B) Mammary glands C) Hollow bones D) Sweat glands E) A four-chambered heart