For each set of dilutions (bleach and mouthwash), the first tube contained a 1:11 dilution (0. 5 ml of agent was added to 5. 0 ml of nutrient broth). What was the dilution of the mic for the mouthwash and the bleach? hint: you will have to calculate the dilution of each tube 2 – 4.

Apopulation of deer mice was introduced into a desert ecosystem. being dark-colored, the deer mice stood out in the sand and were easy prey for predators. over a few years, the color of the mice changed from dark brown to light brown. what role does natural selection play in this example? a. the change of color camouflaged them, which them hunt better. b. the change of color enabled them to regulate their body temperature. c. the change of color allowed them to hide better from predators. d. the change of color made their bodies tolerant to the harsh desert sand. e. the change of color allowed them to deflect the excessive heat.

What is 7/81 as a percentage? round your answer to the nearest tenth of a percent.

Classify each action depending on whether it will meet or fail to meet the goals of the organization. a group of students form a healthy earth club at their school. their goal is to limit their school’s impact on human-led climate change. they brainstormed a list of actions they can take to meet this goal.