Use the concept of coevolution to explain the abundance of large mammals in Africa after the rise of humans but their
rapid demise in the Americas after the arrival of humans? What will be an ideal response?
ANSWER: In Africa, the large mammals were able to coevolve with human populations. They were
able to adapt to humans as they slowly went from harmless to dangerous with the advent of
hunting skills. On the other hand, the humans who arrived in the Americas were already
skilled hunters. The native mammals lacked the time to evolve to this new predator. In many
ways, the arrival of humans in the Americas had more in common with an invasive species.
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Which are short, hair-like structures that project from the surface of the cells?
a. Flagella b. Intermediate filaments c. Microtubules d. Centriole e. Cilia
What is the chromosome number of
endosperm?
a. haploid b. diploid c. triploid d. quatraploid e. it depends on which plant it is in
When individuals in a small population have difficulty finding a mate, this is referred to as
A) density dependence. B) promiscuity. C) the Allee effect. D) self thinning.
The progress of the eukaryotic cell cycle is regulated primarily by what proteins?
A. Cyclins B. Condensins C. Histone proteins D. FtsZ