Suppose a scientist wants to test the effects of a pesticide on mice, so he tags nearby families of wild mice. In each nest, he assigns some mice to the control group and some to the test group. He takes pictures of the mice and measures them. Then, he gives small doses of the pesticides to the mice in the test group. He returns regularly to make observations. What is a probable source of error for this experimental design?

Asap timed! 1. ice core samples from glaciers ice caps contain bubbles of ancient atmosphere that are in layers based on age. what questions are scientists most interested in? a. how the amount of water vapor needed to make the ice has changed b. how the amount of ozone has changed over time.c. how the amount of ice in each layer has changed over time d. how the amount of carbon dioxide has changed over time 2. what produces milankovich cycles ? a. sunspots ams solar flare on the suns surface b. changes in the earths orbit c. gravitational changes bases on the position of the sun and the moond. cycles of vegetation that result in desert and rainforest conditions

Environmental science are unconsidered with methods to preserve natural resourcesa.trueb.false

Aresident is five feet tall.what is the measurements in iches