Which of the following glands increases blood calcium levels?
A) thyroid
B) adrenal
C) parathyroid
D) pituitary
C) parathyroid
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The end of floral shoot where a flower develops is called the ____
a. ovule b. calyx c. receptacle d. filament e. carpel
Tightly curled or wooly hair is caused by a dominant gene in humans. If a heterozygous curly-haired person marries a person with straight hair, what percentage of their offspring would be expected to have straight hair?
A) 100% straight B) 50% straight C) 75% straight D) 25% straight E) It is impossible to predict the outcome.
When the sexes of a species differ in size or appearance, it is called:
a. sexual dimorphism. b. the mating system. c. sexism. d. variance in reproductive success. e. polygamy.
According to one of the main hypotheses for the origin of life, what must have come first?
A. abiotic synthesis of organic monomers B. joining of small molecules to produce macromolecules C. packaging of molecules into pre-cells D. formation of replicating molecules that made inheritance possible