There is NO convincing fossil evidence for which of
the following?
a. evolution
b. extinction
c. change
d. catastrophism
e. uniformitarianism
Answer: d
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Synaptic potentials are due to the opening
a. voltage-gated ion channels b. chemically-gated ion channels
Which of the following is not true concerning a population in equilibrium according to the Hardy-Weinberg rule?
A. There is no migration into or out of the population B. Individuals of the population mate randomly C. The population size is very large D. Selection is favoring the dominant allele E. There is no mutation in the populations
Which of these statements is false?
A) In humans, each of the 22 maternal autosomes has a homologous paternal chromosome. B) In humans, the 23rd pair, the sex chromosomes, determines whether the person is female (XX) or male (XY). C) Single, haploid (n) sets of chromosomes in ovum and sperm unite during fertilization, forming a diploid (2n), single-celled zygote. D) At sexual maturity, ovaries and testes produce diploid gametes by meiosis. E) Sexual life cycles differ with respect to the relative timing of meiosis and fertilization.
You are a chemist designing a test to allow women to know when they have ovulated. Choose the best hormone for your test, which will indicate that ovulation has occurred when detected at high levels.
A. progesterone B. LH C. chorionic gonadotropin D. estradiol