Which of the following is an inference? a. mrs. thompson asked the students turn in their papers before beginning their presentations. b. melanie cleared her throat before the presentation because she was nervous. c. bobby gave his classroom presentation on the bill of rights. d. sarah said she made an outline to her memorize her presentation.

The model illustrates a process by which a substance is taken up by a cell

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.

The distant ancestors of tigers may have had bodies without stripes. use the theory of natural selection to explain how tigers may have evolved to have stripes.