A population that is increasing at a rate of 10% a year will double in 7.2 years
Indicate whether the statement is true or false
TRUE
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Cell division is regulated by:
A. growth factor signals. B. signals that indicate a sufficient size of the cell. C. signals that indicate that DNA has been replicated. D. signals about the nutritional status of the cell. E. All of these choices are correct.
Ducts from the pancreas and gall bladder enter the:
a. stomach b. colon c. small intestine d. gall bladder e. rectum
In animals, a sphere of embryonic cells surrounding a fluid-filled cavity is called a
A. coelom. B. blastula. C. gastrula. D. hydrostatic skeleton. E. gastrovascular cavity
An example of artificial active immunity would be
A. chickenpox infection, followed by lifelong immunity. B. chickenpox vaccine triggering extended immunity to chickenpox. C. giving a person immune serum globulins to chickenpox virus after exposure to the disease. D. a fetus acquiring maternal IgG to the chickenpox virus across the placenta.