New ecological roles that were not previously exploited by an ancestral organism are referred to as:
a. paedomorphosis.
b. adaptive zones.
c. punctuated equilibrium.
d. adaptive radiation.
e. sympatric speciation.
B
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Answer the following statements true (T) or false (F)
1. Damage to the seminal vesicles would prevent sperm from becoming motile. 2. A human female has the largest number of primary oocytes at the onset of puberty. 3. Implantation of the blastocyst into the uterine wall is correlated with the degeneration of the corpus luteum. 4. Neurulation begins with the thickening of the ectoderm over the neural tube.
Which of the following organisms is not an
arachnid?
a. spider b. scorpion c. tick d. ant e. mite
When you are very nervous, perhaps before you must speak in front of your class, you notice that your mouth is dry and your heart is racing. This is most likely due to stimulation by the
A) enteric division of your autonomic nervous system. B) sympathetic division of your autonomic nervous system. C) parasympathetic division of your autonomic nervous system.
Which of the following statements is predicted if a population of fruit flies were fed a chemical that blocked the function of the SXL protein?
A) The progeny in the next generation would be approximately 50% male and 50% female. B) The mRNA produced from the doublesex (dsx) gene would not be spliced. C) The progeny in the next generation would be predominantly female. D) The progeny in the next generation would be predominantly male. E) The transformer (tra) gene would be maximally expressed.