When a wave moves through an opening in a barrier, it a. is reflected. b. bends and spreads out. c. forms nodes and antinodes. d. speeds up.

If there is a 1/2 probability of having a green seed and a 1/4 probability of having a round seed, then what is the probability that the progeny will have both green and round seeds?

Which of these statements is NOT a characteristic of the cladistics system? A) It shows the "rank" of the organism. B) It shows the probable sequence of origins. C) It shows shared, derived characteristics.

For which of these questions could a testable hypothesis be developed?

Which of the following is not a benefit of increased energy efficiency? a. decreased emissions b. decreased use of natural resources c. decreased energy services d. decreased energy use

What causes the striated appearance of skeletal muscles?

In 1883, a catastrophic event caused climate change, a massive tidal wave, and violently red sunsets. Which event below would be the most likely to have caused the listed effects in 1883? A. a volcanic eruption B. a typhoon C. a hurricane D.

What kind of microbe causes HIV?

Which of the following substances would NOT be found in significant amounts in the extracellular matrix of the illustrated areolar connective tissue? A. collagen B. elastin C. keratin D. proteoglycan

What could be one possible effect on human health due to an oil spill? A. Greenhouse gases being emitted into our atmosphere from the vessel can have a negative impact on our air quality. B.

What condition would an increase in bicarbonate ion lead to?