Vertebrates have a closed circulatory system with a dorsal heart and blood containing hemoglobin
____________________ Indicate whether the statement is true or false.
F, ventral
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A laboratory might use dideoxyribonucleotides to _____
A) separate DNA fragments B) clone the breakpoints of cut DNA C) produce cDNA from mRNA D) sequence a DNA fragment E) visualize DNA expression
If the proportion of A bases in a DNA molecule is 22%, then:
A: There will be 22% T. B: There will be 28% G. C: There will be 50% A+G. D: A and B E: All of the above.
Why do populations farther from Africa have more deleterious mutations in their genome?
A. Repeated bottlenecks and founder effects made genetic drift more intense more often. B. Populations farther from Africa have been exposed to more mutagens in the environment. C. Those populations have experienced more intense natural selection, so more deleterious alleles increased in frequency by genetic hitchhiking. D. As people migrated over the globe they interbred with Neanderthals and Denisovans. E. The populations are younger, so purifying selection has not had time to purge deleterious mutations from the populations.
Compare and contrast the three types of eukaryotic microbes
What will be an ideal response?