Answer the following statements true (T) or false (F)
1.The zebra mussel and the gypsy moth both have reduced biodiversity in North America.
2.One important conservation tool used to restore native populations is to set aside an area and protect it from overexploitation, invasive species, and habitat destruction.
3.After nearing extinction in the 1960s, the bald eagle population is now about 10,000.
4.The greatest threat to the endangered great spotted kiwi of New Zealand is introduced predators.
5.Suspended matter that floats in the air, such as ash, soot, mold spores, and road dust, is known as particulates.
1.TRUE
2.TRUE
3.TRUE
4.TRUE
5.TRUE
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The spores of a fern are
(a) produced by mitosis within the sporangium. (b) diploid cells. (c) the first cells of the gametophyte generation. (d) both a and b.
Which of the following is true of both neurotransmitters and hormones?
A. They are both involved in paracrine signaling. B. They both interact with receptors inside or on the surface of target cells. C. They are both produced in glands. D. They both travel through the bloodstream to target cells. E. They both influence the activity of multiple organs simultaneously.
Prolactin, oxytocin, and estrogen exhibit which type of hormone interaction?
a. synergistic b. permissive c. opposing d. unrelating e. mutual
Which of the following statements regarding tuberculosis is FALSE?
A) Nearly 1/3 of the world's population is infected with tuberculosis. B) Nearly 1/3 of the world's population shows symptoms of tuberculosis. C) It is responsible for nearly 2 million deaths per year. D) At least 1/3 of those who are TB-positive are also HIV-positive. E) Treatment requires at least six months of antibiotic therapy.