What does the abbreviation LUCA stand for and what does it mean?
What will be an ideal response?
ANS:
LUCA is the last universal common ancestor. It was the population of organisms that gave rise to all life on Earth today.
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Could an isolated melanin granule move along an actin microfilament?
A. Yes, melanin granules have motor proteins. B. Yes, motor proteins all use ATP to cause a conformation change. C. No, motor proteins are specific for the type of filament they bind. D. Answers a and b are both correct.
Eukaryotes, archaeons, and bacteria can all successfully oxidize H2S or NH4 to form SO4 or N2, respectively
A. true B. false
The famous skeleton named Lucy belong to which species?
a. Homo erectus b. Homo habilis c. Australopithecus afarensis d. Homo floresiensis e. Neanderthals
Does the ability to disperse over long distances lower a species' chance of extinction?
a. Yes, as data on Cretaceous gastropods show that species with higher dispersal ability have lower extinction rates. b. No, there is no relationship between a species' dispersal ability and its range. c. Not necessarily, this is only the case if species range correlates positively with dispersal abil-ity. d. No, in Cretaceous gastropods species with long range dispersal have an increased chance of extinction.