Which of the following processes starts with the nucleus and involves the endoplasmic reticulum and ribosomes?
a. breaking down sugar to obtain energy in the form of atp
b. assembling amino acids into chains that form structures and enzymes
c. engulfing, digesting, and recycling old worn-out cells and molecules
d. assembling sugar molecules in chains to form stored energy molecules

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.

This group of organisms perform the process of ammonifcation. a. herbivores b. decomposers c. carnivores c. plants

How many chromosomes does each human cell contain? a. 23 chromosomes b. 26 chromosomes c. 43 chromosomes d. 46 chromosomes