Which of the following has a major effect on the rate of transpiration?
a. soil minerals
b. growth rate
c. air temperature
d. predation
Answer: c. air temperature
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Which of the following is not a feature of miRNAs?
A. Primary miRNA transcripts have internal complementary sequences capable of forming hairpin structures. B. Precursor miRNAs have internal complementary sequences capable of forming hairpin structures. C. miRNAs are exported to nuclease in their single-stranded form. D. Precursor miRNAs are approximately 60–70 nucleotides long.
Polyploidy is
A. common in plant species. B. common in fungal species. C. common in animal species. D. common in bacterial species. E. All answers are correct.
When a person is exercising, CO2 builds up in the blood. What effect would this have on external respiration?
A) There would be increased diffusion of CO2 out of the blood and into the lungs and decreased ventilation to move it out of the body. B) There would be decreased diffusion of CO2 out of the blood and into the lungs and decreased ventilation to move it out of the body. C) There would be decreased diffusion of CO2 out of the blood and into the lungs and increased ventilation to move it out of the body. D) There would be increased diffusion of CO2 out of the blood and into the lungs and increased ventilation to move it out of the body.
Please match the types of mutations with the statements that most accurately describe them, to test your understanding of their causes.
Induced mutation A) Random change in the DNA arising from errors in replication that occur without a known cause B) Result from exposure to known mutagens, which are primarily physical or chemical agents that damage DNA C) Changing of single base in the DNA code that may result in the placement of a different amino acid D) Addition or deletion of bases that changes the reading of mRNA codons