Chloroplasts arose via _____.

A. endosymbiosis of euglenids
B. endosymbiosis of ?-Proteobacteria
C. endosymbiosis of cyanobacteria
D. endosymbiosis of dinoflagellates


Answer: C. endosymbiosis of cyanobacteria

Biology & Microbiology

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Which of the following descriptions of genetic information flow best illustrates the central dogma of biology?

A) DNA to RNA to protein B) RNA to DNA to protein C) protein to DNA to protein D) protein to RNA to DNA

Biology & Microbiology

Which of the following occurs during the Calvin cycle of photosynthesis?

A) Chlorophyll acts as an enzyme, but only in the dark. B) Carbon dioxide is converted to chemicals that can be used to make sugars. C) Nothing occurs because the plant rests in the dark. D) Water is converted to its most basic elements, hydrogen and water.

Biology & Microbiology

Which hormone sets the body's basal metabolic rate?  

A.  estrogen B.  insulin C.  norepinephrine D.  cortisol E.  thyroxin

Biology & Microbiology

The process where cartilage is gradually replaced with bone tissue during fetal development is called ________

Fill in the blank(s) with correct word

Biology & Microbiology