How is variation in large natural populations possible?
a. The presence of alleles in individuals
b. The presence of DNA in individuals.
c. The presence of chromosomes in individuals.
d. The presence of genes in individuals.
a
You might also like to view...
What is the result of DNA ligase's action?
A. DNA is broken up at specific sites. B. DNA fragments are joined together. C. DNA translation occurs. D. DNA transcription occurs. E. DNA is condensed to chromosomes.
Recall that during the Paleozoic Era, atmospheric CO2 levels decreased. Why?
A. New, extensive mountain ranges formed and chemical weathering decreased. B. Earth's plate tectonics changed dramatically, and subduction increased. C. Photosynthetic, woody plants first appeared during this period. D. Volcanism decreased during this period.
The ribosome binding site in an mRNA transcript is located ____ and is where ____
a. at the start codon; the large ribosomal subunit binds to the mRNA-tRNA complex in prokaryotes b. just upstream of the start codon; the large ribosomal subunit binds to mRNA in eukaryotes c. at the start codon; the small ribosomal subunit binds to the mRNA-tRNA complex in eukaryotes d. on aminoacyl-tRNA; the large ribosomal subunit binds to tRNA in prokaryotes e. just upstream of the start codon; the small ribosomal subunit binds to mRNA in prokaryotes
Which of the following is a junction between
two neurons? a. Schwann cell b. chemical synapse c. unsheathed node d. sodium gate e. all of these