The purpose of including an outgroup in the construction of a phylogeny is to __________.
a. indicate whether two characters are homologous
b. determine dates of divergence between lineages
c. determine which characters are ancestral
d. increase parsimony
e. All of the listed responses are correct.
Ans: c. determine which characters are ancestral
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In a process called ____, cells lose their normal regulatory controls and revert partially or completely to an embryonic
developmental state.
a. metastasis b. embryogenesis c. induction d. determination e. dedifferentiation
Some anaerobic protists obtain energy using ________.
A. mitochondria B. hydrogenosomes C. cytochromes D. All of the choices are correct.
One end of a strand of DNA is different from the other end
Indicate whether this statement is true or false.
Which of the following is a possible social consequence of long-term exponential growth in the human population?
a. Increased life expectancy b. Increased crime c. Harnessing of energy in fossil fuels d. Higher fertility rates