A scientist is observing a worm that was found inside a host. The worm has an outer body that is smooth and soft. Which worm is the scientist least likely to be observing?

an earthworm
a pinworm
a hookworm
a tapeworm

What are the characteristics of living things

Study this image which statement best describes the rock shown check all that apply

What is point source pollution of an aquatic ecosystem? a) pollution of freshwater sources b) pollution from many sources that combine into one c) pollution that occurs over a wide area; water that runs off from fields, parking lots, and other land surfaces d) pollution that can easily be identified with a single discharge source, such as an open pipe which drains into a body of water