The primary function of cellular membranes is ____
a. the controlled transport of ions and molecules across the membrane
b. cell-cell binding
c. recognition of other cells as being "like"
d. reception of chemical signals form other cells
e. participation in metabolic reactions
A
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What is the main factor in the occurrence of speciation?
a. Biochemical isolation b. Hybridization c. Temporal isolation d. Geographic isolation
After a baby is delivered, what else is expelled from the female's uterus?
a. placenta b. uterine lining c. primary oocytes d. oxytocin e. corpus luteum
The variability among people in sensitivity to environmental carcinogens is partly genetic. Indicate whether the statement is true or false
In 1978, Arber, Smith, and Nathans won the Nobel Prize in Physiology and Medicine for work with restriction enzymes. Which of the following can still be performed without using these enzymes?
A) PCR of whole genomes B) genetic mapping C) sequence cloning D) vector packaging E) making recombinant DNA