Which of the following treatments would enhance the level of the Pfr form of phytochrome?
A) exposure to far-red light
B) exposure to red light
C) a long dark period
D) inhibition of protein synthesis
E) synthesis of phosphorylating enzymes
Answer: B
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In gene therapy, what is transferred into an
individual’s body cells?
a. new genomes b. recombinant DNA c. GMOs d. bacterial plasmids e. DNA libraries
Each new cell that forms during cleavage is called a(n)
a. zygote. b. morula. c. gastrula. d. blastomere. e. endoderm.
What term refers to the ability of a cell membrane to regulate which molecules can enter and exit the cell?
a. transport selection b. osmosis c. cell recognition d. selective permeability e. fluidity
What is a cost to the female in a polygynous mating system?
A. little opportunity to mate with a genetically fit male B. high risk of contracting sexually transmitted diseases C. little help from male in caring for offspring D. high competition between females for access to males