During ____ , N2 within the atmosphere is converted to NH3. Primary producers can then use the nitrogen from NH3 to build organic compounds
Fill in the blank with the appropriate word.
nitrogen fixation
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Which of the following is/are among the changes sperm may undergo once they enter the female reproductive tract? (Select all correct choices.)
A. changes in the fluidity of the plasma membrane B. loss of surface membrane proteins C. changes in membrane potential D. increased motility E. release of enzymes from the acrosome
Which of the following is true regarding bacterial genetics?
A. Bacteria are usually diploid organisms B. Bacteria primarily reproduce sexually C. The patterns of inheritance in bacteria are studied using different mechanisms than eukaryotes D. Bacteria generally have linear chromosomes
Ribosomes leave the nucleus as
a. intact 80S ribosomes. b. intact 70S ribosomes. c. 40S and 60S ribosomal subunits. d. 18S and 28S rRNAs.
What situation may result when people stop taking their antibiotics too soon because they already feel better?
A. A drug-resistant strain is born. B. The person will have to restart the antibiotic course. C. The person will continue to feel fine. D. The person will be immune to that type of infection.