Which of the following describes rRNA? A. Carries amino acids from the cytoplasm to the ribosome, during translation.
B. Part of the ribosome that reads the code and builds the polypeptide chain.
C. Created during transcription; carries DNA’s message from the nucleus to a ribosome
D. All of the above.

African penguins, which inhabit the coasts of southern africa, were classified as an endangered species in 2010. two significant threats to their survival are ecosystem damage from oil spills and overfishing by humans. overfishing depletes the food supply of african penguins. the best method to reduce the threat of overfishing would be to . the risk of oil spills could be reduced by increasing the use of , which should oil consumption. if an oil spill does occur, could be used to remove the oil so the ecosystem may more quickly recover.

Describe the relationship and movement between temperature and density in a convection cell. make sure you identify the direction of travel

How did alexander fleming’s research solve a societal problem? he developed ways to treat inherited diseases. he advocated for regular hand washing to kill germs. he discovered a new type of medicine that could treat infections. he discovered the cause of mad cow disease, an emerging disease.