The immune system is made up of:

Options:

Organs

Tissues

Cells

All of the above (since cells and tissues make up organs)

Which of the following describes the structure of a lipid? O A. Lipids are long chains of nucleotides. O B. Lipids are long chains of sugar molecules, O C. Lipids are long chains of carbon atoms bonded to hydrogen or oxygen O D.

Heterozygous genes will always display a dominant trait. a. True b. False

What is the result of mitosis (how many cells and how are they alike and different from the original) ?

After the process of digestion has occurred, water-soluble nutrients are absorbed into the portal vein and are transported to the liver, whereas fat-soluble nutrients are absorbed into the lymphatic system and transported directly into the

What is the role of keratin in the skin?

4. A tree dropping its leaves in the fall to conserve water and avoid freezing during winter is an example of?

Which is a single-celled fungus? A. mold B. mushroom C. alga D. yeast

Explain problems with using low-tar, low-nicotine cigarettes.

Some students are comparing the parts of a cell to the parts of the body. Which part best represents the cell membrane and why?

What is the difference between the nitrogen and carbon cycles?