How could you distinguish between the two pathogens Streptococcus aureus, which causes

strep throat, and Plasmodium falciparum, which causes malaria?



a. S. aureus does not have any genetic material.
b. S. aureus is larger than P. falciparum.
c. P. falciparum has membrane-bound organelles.
d. S. aureus does not have a cell membrane


C

Biology & Microbiology

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In nature, the major mechanism of introducing new genes into eukaryotic genomes is _____

A) duplication followed by evolutionary divergence B) unequal crossing over at microsatellite repeats C) pseudogene creation D) pseudogene restoration

Biology & Microbiology

A ____ restricts productivity

a. primary producer b. secondary producer c. photosynthesizer d. detritivore e. limiting nutrient

Biology & Microbiology

Since 2008, grizzly bears (Ursus arctos horribilis) have been spotted farther north than their historic range. As a result, grizzly bear habitat now overlaps polar bear (Ursus maritimus) habitat. The two species of bears, which are capable of mating and producing viable offspring, are considered separate “ecological” species because historically they lived in different habitats and never met. However, in 2006 a hunter shot a wild grizzly-polar bear hybrid known as a grolar bear, the first wild hybrid ever found. This overlap is due to which of the following threats to biodiversity?

a. overharvesting b. habitat loss c. global climate change d. introduction of exotic species

Biology & Microbiology

Lyme disease is vectored by ticks.

Answer the following statement true (T) or false (F)

Biology & Microbiology