Collect data: Select the EARTH tab. Fill in the information for the latitude 40° S, on June 21 and December 21. (To measure the Sun ray angle, select Show protractor. The angle will be between 0 and 90 degrees.)

Draw the structure of dna nucleotide with adenine as nitrogenous base

Which of the following statements about protists are true? a.they are typically found in moist environments. b.they are all unicellular. c.they have a nucleus. d.they are all multicellular.

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