Transmembrane movement of a substance up a concentration gradient requires ________ transport

Fill in the blank with correct word.


Answer: active

Biology & Microbiology

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A sizable population was analyzed for SNPs in a certain DNA region. Four possible variants were found, with the following frequencies: SNP 1: GGTCTAGGA; frequency = 0.91 SNP 2: GGTGTAGGA; frequency = 0.03 SNP 3: GGTATAGGA; frequency = 0

03 SNP 4: GGTTTAGGA; frequency = 0.03 If the population is in Hardy-Weinberg equilibrium, what is the total frequency of heterozygotes at this SNP locus? A) 0.828 B) 0.009 C) 0.170 D) 0.055 E) 0.0018

Biology & Microbiology

The very first primates were

A. monkeys. B. gibbons. C. prosimians. D. apes.

Biology & Microbiology

Ferns possess all of the following EXCEPT:

a. cuticles. b. embryos. c. seeds. d. roots. e. leaves.

Biology & Microbiology

In tomatoes, red (R) is dominant to yellow (r), tall (D) is dominant to dwarf (d), and smooth (H) is dominant to hairy (h). How many possible different phenotypes are there in relationship to these three characteristics?

A. 6 B. 8 C. 9 D. 16 E. 27

Biology & Microbiology