1. A biologist collected water samples from local ponds. Which set of conditions below would indicate the greatest diversity of organisms?*
a) low oxygen levels, high light levels, many nutrients
b) high oxygen levels, low light levels, few nutrients
c) high oxygen levels, high light levels, few nutrients
d) high oxygen levels, high light levels, many nutrients

An atom of nitrogen had seven protons in its nucleus. how many electrons does it have

The united states produces an average of 429 billion pounds of food annually. about 133 billion pounds of that food ends up as waste. the percentage of food that the united states wastes each year is %.

8) animals respond in various ways to stimuli detected through their senses. some of these responses are stimulated by the presence of danger. which of these animal responses is the best example of a response to an immediate threat? a) a rooster crows every morning at the first sign of light. b) as something approaches an octopus, it shoots a cloud of ink. c) from late fall until spring, bears hibernate to preserve energy. d) a dog is getting hot in the sunlight, so he moves to a shaded area.