¨The Integumentary System¨" 1. What are the four parts of the integumentary system?

2.What are the three functions of the skin?

3. In terms of protection, what are 2 bad things that our skin keeps out of our bodies?

4. Other than sweating, what can skin do to keep our bodies cool?

5. What are the three layers of skin called?

6. What do you call the outermost layer of skin that consistently dies off and is replaced by new cells?

7. The dermis is thicker than the epidermis. This allows it to contain 3 important structures. What are they called?

8. The hypodermis is the lowest layer of skin. What is its function?

what are the options?

small, big, or no change could occur in the phenotype. it could cause something as simple as a cats ears to curl backwards or something as frighting as death. it could also occur in the protien-coding area and have an effect on that but no effect on the amino acids. what has to occur is a changing in the hox gene or the control gene.

step 1: nitrogen fixation- conversion of atmospheric no₂ into forms useful to plants by lightning, bacteria, and cyanobacteria.

step 2: nitrification-process of converting ammonia to nitrite or nitrate.

step 3: assimilation-plant roots absorb new form of nitrogen.

step 4: ammonification-conversion of organic nitrogen to ammonia by bacteria involved in decomposition.

step 5: denitrification-bacteria turns the decomposed matter back into n₂o, which is released into atmosphere; repeat cycle.