An electrode is analogous to the Miller-Urey experiment, which of the following is analogous to primordial Earth?
a. water vapour
b. a strongly reducing atmosphere
c. lightning
d. a primeval sea
Answer: c. lightning
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Most mutations that affect developmental regulatory genes are ________________.
Fill in the blank(s) with the appropriate word(s).
Which of the following statements is correctly
related to the opening of stomata?
a. potassium is pumped into the guard cells and water follows by osmosis b. potassium and water are both actively pumped into the guard cells c. potassium is pumped out of the guard cells and water follows by osmosis d. potassium and water are both actively pumped out of the guard cells e. none of these statements is correctly related to the opening of stomata
DNA microarrays have made a huge impact on genomic studies because they _____
A) can be used to eliminate the function of any gene in the genome B) can be used to introduce entire genomes into bacterial cells C) allow the expression of many or even all of the genes in the genome to be compared at once D) allow physical maps of the genome to be assembled in a very short time
The ability of a pathogen to enter a cell, spread, and cause disease is termed
a. pathogenesis. b. invasion. c. colonization. d. adherence.