Which of the following is a correct pair based on their shared characteristics?
a. Earth and a closed system
b. the universe and an open system
c. an ocean and a closed system
d. an ocean and an isolated system
Ans: a. Earth and a closed system
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In the image above, the substance indicated as
"B" is a(n) a. inhibitor. b. activator. c. substrate. d. coenzyme. e. cofactor
What type of allele is often detected as a distortion in segregation ratios, where one class of expected progeny is missing?
A) dominant negative allele B) temperature-sensitive allele C) lethal allele D) partial dominance E) incomplete penetrance
To strengthen the conducting cells and help plants stand erect without water for them to float in, land plants developed
A) stomata. B) a cuticle. C) flowers. D) vascular tissue. E) lignin.
Using the numbers 1-4, label the correct chronological sequence of events for the Gram staining procedure.(1, 2, 3, 4) Apply iodine for 1 minute to the smear and rinse.(1, 2, 3, 4) Add crystal violet for 60 seconds and rinse.(1, 2, 3, 4) Add 95% ethanol for 10-20 seconds and rinse.(1, 2, 3, 4) Apply safranin for 60 seconds and rinse.
Fill in the blank(s) with the appropriate word(s).