Which of the following cell structures has the primary role of synthesizing proteins in eukaryotic cells? a. endoplasmic reticulum and mitochondria b. nucleus and vacuolesc. endoplasmic reticulum and ribosomes

Name the plastid and pigment likely to be found in the cells of (a) petals of sunflower (b) ripe tomato.

Which of these serves as a reference for comparison during a scientific investigation? a)outcome variable (dependent variable) b) test variable (independent variable) c)control group d)hypothesis

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.