Which best describes organisms of the precambrian era? a. land plants and animals b. dinosaurs and primitive mammals c. single-celled organisms and soft, boneless animals d. ferns and flying reptiles

The process of meiosis produces only gametes, eggs or sperm. according to the diagram, how many sperm are formed from each cell that undergoes meiosis?

What contributes to the high level of biodiversity found in wetlands? a. the large amount of available organic matter to organisms that are food for larger organisms b. the amount of available water for organism use c. the high nutrient availability d. all of the above select the best answer from the choices provided a b c d

Which of these definitions have been paired with the correct type of cell?