The pesticide DDT was used to kill mosquitoes for many years. DDT into the bodies of water, moved up the food chain, and build up in the tissues of fish. One female bald eagles eat this fish, they produce eggs with very thin shells. The eggs broke when the bald eagle sat on their nests. The US government banned the use of DDT in 1972. Which of the graph shown most likely shows how the ban of DDT affected the board equal population?

Which statement is not an accurate description of meiosis? a) meiosis produces offspring that are genetically diverse. b) meiosis produces offspring that are identical to the parent. c) in sexual reproduction half of the genetic material comes from the father (sperm) and half of the genetic material comes from the mother (egg). d) meiosis decreases the number of chromosomes by half so that when a sperm fertilizes an egg, the resulting zygote has the correct number of chromosomes.

What are positive impacts of algae? how is it used?

Will ! a cell containing a 3% sucrose solution is placed into a beaker containing a 7% sucrose solution. assume the cell’s membrane is permeable to water, but not permeable to the sucrose. where will the water diffuse? explain.