Recent research suggests that ________ has/have contributed to the large drop in fertility rates in Brazil over the past several decades
A) legalization of abortions
B) soap operas
C) AIDS and malaria
D) laws preventing women from having more than one child
E) exposure to environmental estrogens
B
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Is air a specific gas? Explain
What will be an ideal response?
When caught in a thunderstorm in an open field, the best thing to do is to
a. run for cover under the nearest tree. b. lie down flat on the ground. c. crouch down as low as possible while minimizing contact with the ground. d. remove all metallic objects from your pockets. e. climb up onto a hill.
Supercell thunderstorms differ from ordinary cell (air mass) thunderstorms because
a. the updraft in a supercell thunderstorm is shorter-lasting and is stationary.. b. ordinary thunderstorms do not produce hail. c. supercell thunderstorms produce precipitation. d. the supercell thunderstorm is greater in size. e. the updraft in a supercell thunderstorm is longer-lasting and rotates.
Which type of stream only flows for part of the year?
A. perennial stream B. annual stream C. intermittent stream D. ephemeral stream E. periodic stream