Ethylene is a gaseous plant hormone that pri manly affects the ripening of fruit

Question

Ethylene is a gaseous plant hormone that pri manly affects the ripening of fruits by causing complex carbohydrates to break down into simple sugars. 13, T F 14. TF Auxins such as indoleacetic acid tend to decrease stem length. 15. TF The spongy mesophyll of leaves is found on the top of leaves, where most photosynthesis occurs For each of the following, write on the blank line the letter of the word or phrase that best completes the statement or answers the question. In nonvascular plants, nutrients travel by (A) the phloem and xylem. (B) the xylem and osmosis. (C) the phloem and diffusion. (D) osmosis and diffusion. Openings in the outer cell layer of leaves that allow for the exchange of gases 6. are called (A) spores. (B) stomata. (C) strobilus.(D) petioles Plants that will flower as long as the number of hours of darkness is neither too great 18. nor too few are called (A) day-neutral plants (C) intermediate-day plants. (B) short-day plants. (D) long-day plants. Plants in which division can live as long as 1500-2000 years? (A) Division Cycadophyta (B) Division Gnetophyta C) Division Ginkgophyta (D) Division Coniferophyta A flowering plant that has a life span of several years is called an) (A) biennial plant. (B) annual plant. (C) perennial plant. (D) nonvascular plant. 19, 20. Rapidly dividing cells are found in (A) dermal tissue. (C) ground tissue. 21. (B) vascular tissue. (D) meristematic tissue. 2341 42

Explanation / Answer

13) TRUE

14) FALSE

15) FALSE

16) C. Phloem and diffusion

17) B. Stomata

18) B. Short day plant

19) B. Division Gnetophyta

20) C. Perennial

21) D. Meristemetic tissue

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