An early sign of plaque formation in coronary arteries is
a. a heart attack.
b. hypertension.
c. hypotension.
d. angina pectoris.
e. rapid heart beat.
D
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Which of these is not part of the life cycle of brown algae?
A. meiosis B. multicellular haploid stage C. multicellular diploid stage D. gametes produced by mitosis E. spores produced by mitosis
In the 2009 article "Genomic Footprints of a Cryptic Plastic Endosymbiosis in Diatoms" (Science 324: 1724-26), Moustafa et al. described their search for possible gene transfer from organelles to the nucleus in diatom genomes
They assumed that diatomic plastids came from red algae. However, they found that most were from green algae. Which is most likely? A) Diatoms once had green algal endosymbionts. B) Red algae had green algal endosymbionts. C) Red plastids were replaced by green plastids. D) Cyanobacteria imported green plastid genes. E) All red algal genes mutated to green algal genes.
Which rule states that atoms attempt to acquire an outermost energy level with eight electrons through chemical reactions?
A. octet B. atomic stability C. hybridization D. full energy level
Baculovirus genomes are 133.9 kb long and encode over 150 genes. This suggests that
A. their protein coats consist of very few types of protein subunits. B. their genetic material is DNA. C. they have a small host range. D. their protein structures are very complex. E. their genetic material is RNA.