Why is lime water covered in oil during alcoholic fermentation? Motivate your answer.​

Which of the organisms listed below performs nitrogen fixation? a. legumes b. plants c. bacteria d. fungi

This is a situation in which genes are attached to an organism's sex chromosomes; the sex of an organism influences the expression of a gene.

Which member of the following food chain will be least affected by ddt, a pesticide water pollutant, if bio-magnification is occurring? algae> zooplankton> crayfish> leopard frog> large mouth bass