Which describes how mrna is used by a cell? a. it is used to replicate dna for meiosis. b. it is used to stop toxins from entering the nucleus. c. it is used to prevent mutations in dna. d. it is used to transfer information to the ribosome.

The graph shows the amount of global warming happening in different ecosystems. which populations of organisms will likely decline the most as a result of climate change, and why? a. coral reefs because of the loss of the symbiotic algae living within their bodies b. penguin populations because the fish they eat will move into warmer waters c. mountain-dwelling birds because rising sea levels will relocate their food sources d. large cats in the rainforest because of decreased habitat loss for their prey

Which structure in the cardiovascular system connect arteries to veins?

Anormal strand of dna is shown below, followed by the same strand of dna after mutations have occurred.