Octopuses and squid have a closed circulatory system with _______ heart(s).
a. one
b. two
c. three
d. eight
c. three
Octopuses and squid have a closed circulatory system with three hearts.
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Which of the following with regard to cancer cells is false ?
A) Growth is not regulated by growth factors. B) The cell cycle is disrupted. C) Most cancer cells die in G1 phase. D) Growth is not stopped by high levels of DNA damage. E) The apoptosis pathway is blocked.
What is the most common reason that some people oppose environmental protection? a. They fear the economic consequences
b. They do not care about the environment. c. They want to profit from biological wealth. d. They are more interested in cultural wealth.
Which one of the following is TRUE regarding mature human gametes?
A) produced by the process of mitosis B) contain the haploid number of chromosomes C) produced in the testes and oviducts D) are also known as primary spermatocytes and primary oocytes E) contain 46 chromosomes
Study the life cycle diagram. Label B is the ________ life cycle.
A. lysogenic B. lytic C. sexual D. alternation of generations