Increased phosphate levels in the Everglades has led to:
A. displacement of native plants by
phosphate-loving introduced plants.
B. eutrophication followed by declines in fish
and alligator populations.
C. increased plant growth and diversity.
D. expansion of native plants into adjacent
ecosystems.
E. declining populations of low-phosphate
adapted cattails.
A
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The work of Reznick and Endler with guppies
shows all of the following EXCEPT that a. life history traits can be inherited. b. life history traits evolve. c. life history traits can be altered over a short period of time. d. predation does not influence the modification of life history traits. e. life history traits are coded for in DNA.
In an HIV-infected cell producing HIV virus particles, the viral glycoprotein is expressed on the plasma membrane. How do the viral glycoproteins get to the plasma membrane? They are synthesized _____
A) on ribosomes on the plasma membrane B) by ribosomes in the rough ER and arrive at the plasma membrane in the membrane of secretory vesicles C) on free cytoplasmic ribosomes and then inserted into the plasma membrane D) by ribosomes in the rough ER, secreted from the cell, and inserted into the plasma membrane from the outside
Where in the cell are the receptor proteins located on the postsynaptic cell synthesized?
A. the Golgi apparatus B. the cytoplasm C. the rough endoplasmic reticulum D. the lysosome
All of the following are true about plasmids EXCEPT:
a. Plasmids are small portions of circular DNA found in bacteria. b. Plasmids often encode for genes that carry toxins or antibiotic resistance. c. Plasmids can be transferred from one bacterium to another. d. Plasmids contain DNA and are found in the nucleoid region of bacteria