Population growth will most likely continue at its current rate for at least 60 years because ________
a. the Earth is nowhere near its carrying capacity
b. more than one-third of the world's population is in the pre-reproductive base
c. the world's baby boomers (those born between 1946 and 1960) will continue to have children
d. any reduction in birth rate will be offset by declines in death rates as medical advances reach the less-developed countries
b
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Recent discoveries of microscopic fossils have extended the known history of life to about:
A. 1 billion years ago. B. 2 billion years ago. C. 3.5 billion years ago. D. 4.5 billion years ago.
A disease that is constantly present in low numbers is called an acute disease
Indicate whether the statement is true or false.
A large lateral spine is characteristic of which Schistosoma egg?
a. Schistosoma mansoni b. Schistosoma japonicum c. S. haematobium d. Schistosoma mekongi
a. integral proteins
a. hydrophobic b. hydrophilic c. both hydrophobic and hydrophilic d. neither hydrophobic nor hydrophilic