If the oxygen level in the water dropped below 4 milligrams per liter of water, blue crabs would most likely do which one of the following: a. Increase rapidly in size
b. Decrease in population
c. Relocate to the shore
d. Move closer to plants for shelter

Question 17 (1 point) where does penicillin come from? a. it is a chemical that man invented b. it is a fungus c. it is a toxin made by other bacteria d. it was discovered in archaebacteria

What are the characteristics of carbon bonds? check all that apply.

What is one affect on the australian environment due to the introduction of non-native european rabbits? (a) more grass grew in response to the need of the growing population of rabbits. (b) the rabbits balance out the food chain as they became a natural prey to many predators. (c) the rabbits the land by digging, which caused the soil to spread much needed nutrients. (d) the rabbits out-competed other small animals species and caused them to go extinct.