Question 9
agricultural runoff is polluting the chang jiang in china. what effect does the flow of large amounts of fertilizer and sewage have on the river?
a
it encourages germs to grow in the river, causing people and animals that drink the river water to become sick.

b
it causes large plants to grow thickly along the shore of the river, preventing animals and people from accessing the river.

c
it settles on the river bottom in thick, sludgy layers, making the river too shallow for commercial and recreational boats to navigate.

d
it causes algae and plants to grow and cover the surface of the water, blocking sunlight and killing plants and animals that live underneath.

Which powers best complete this graphic?

Which of the following statements best describes the concept behind labor unions?

According to the federal regulations, which of the following studies meets the definition of research with human subjects? a researcher conducts a comparison of the comments made in a publicly available blog and the blogger's comments on a similar topic in a weekly magazine. undergraduate students in a field methods class are assigned a research question and asked to interview another classmate, to be followed by a class discussion on interview techniques. a cognitive psychologist enrolls undergraduate students for a computer-based study about the effect of mood on problem-solving behaviors. a researcher sets up a meeting with the superintendent of a large and diverse public school system to get data about the ethnic composition of the school system and the number of students receiving free lunches.