The last common ancestor of all animals was probably a _____
A) unicellular chytrid
B) unicellular yeast
C) multicellular algae
D) multicellular fungus
E) flagellated protist
Answer: E
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Amino acids are processed first by the removal of the amino group through
A. deamination. B. deamination or transamination. C. transamination. D. phosphorolytic cleavage.
Match the following items with the correct phrases.
_______1. The causative agents of dengue fever, filariasis, malaria, West Nile encephalitis, and yellow fever are all transmitted by ____________________. _______2. ____________________ transmit the causative agents of babesiosis, ehrlichiosis, Lyme disease, relapsing fever, and Rocky Mountain spotted fever. _______3. The causative agent of American trypanosomiasis (Chagas's disease) is transmitted by arthropods in a class of insects known as ____________________. _______4. ____________________ transmit the causative agents of epidemic typhus and trench fever. _______5. African sleeping sickness, leishmaniasis, and onchocerciasis are transmitted by various types of ____________________. a. biting flies b. bugs c. lice d. mosquitoes e. ticks
Which group has the largest number of chromosomes?
a. hepatophytes b. gymnosperms c. angiosperms
d. lycophytes e. charophytes
Refer to the paragraph on dark-eyed junco birds. The UCSD campus male junco population tails are about 36% white, whereas the tails of males from nearby mountain populations are about 40-45% white
The founding stock of UCSD birds was likely from the nearby mountain populations because some of those birds overwinter on the UCSD campus each year. Population sizes on the UCSD campus have been reasonably large, and there are significant habitat differences between the UCSD campus and the mountain coniferous forests; UCSD campus has a more open environment (making birds more visible) and a lower junco density (decreasing intraspecific competition) than that in the mountain forests. Given this information, which of the following evolutionary mechanisms do you think is most likely responsible for the difference between the UCSD and mountain populations? A) natural selection B) genetic drift C) gene flow D) mutation