On a separate piece of paper construct a table with a row for each of the following cycles of matter (water, carbon, and nitrogen) and a column for each process (physical/chemical, biological, geological, and human). Fill in the table with examples of each process, using the text and figures in Lesson 4.3.

Question#29: why does the tropical ocean have a greater temperature range than the temperate ocean?

True or false: (a) the strings of little red dots represent carbohydrates. (b) the model is called a bilayer because there are two main types of molecules present, lipids and proteins. (c) the many black lines represent amino acid tails. (d) this model shows membrane transport. (e) the blue ovals are hydrophobic. (f) the blue ovals represent phospholipid heads.

Which of the following molecules could pass through the plasma membrane by simple diffusion? a. na+ ions b. glucose c. amino acids d. carbon dioxide