Which actions are functions of the circulatory system? Select four options.

delivers nutrients to cells
brings carbon dioxide to cells for use
protects the body from pathogens
removes waste materials from cells
helps cuts and wounds to heal

Look at the following answer choices and determine which belongs in the both category. testable, can be disproven explains natural phenomena, has evidence to support it prediction, tentative, one or more scientists working together well established, many different scientists working independently, highly reliable

There are specialized producers that live in warm water vents deep in the ocean. these producers do not per-form from photosynthesis, but instead perform a similar process with iron and other chemicals. why do you think these producers use this process instead of photosynthesis?

Explain why phospholipid molecules form a bilayer. (3 marks)