5. Use the illustration to answer the following three questions. 5a. Which of the structures may represent aquarorins?

5b. Can any of the structures labelled 4, 5, 9, and 11 play a role in signalling? Explain your
answer.

5c. What structure is labelled by 3, and therefore, which type of cell does the illustration
represent?

oak trees? ? what was listed

what statement best describes the difference between the sympathetic and parasympathetic nervous systems?

the sympathetic nervous system prepares the body for intense physical activity and is often referred to as the fight-or-flight response. the parasympathetic nervous system has almost the exact opposite effect and relaxes the body and inhibits or slows many high energy functions.

both male and female gametes are produced by meiosis of the germ cells. therefore, both male and female gametes are haploid. one male and one female gamete unite during the fertilization to form the diploid zygote. in seed bearing plants, pollen grain is the male gametophyte, which produces sperm cells.