What do red blood cells, white blood cells, and platelets have in common?
all are part of lymph.
all are produced in the bone marrow.
all are involved in destroying pathogens.
all are self-secreting hormones.

What does all of the organ system in a human form

Which of the following best describes the purpose of technology?

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.