机体生物学 36 - L26/27: Study Questions

回顾问题不定期更新 Study Questions are Made by Prof. Cruz & Prof. Moore from Oberlin College & Conservatory 

Lectures 26 & 27: Plant Life Cycles

1. Given the following characteristics, predict whether each of the following plants is homosporous or heterosporous, and then determine the ploidy level of the indicated structure:

a) a plant with a prothallus

b) a plant with fruits

c) a plant with pollen

d) a plant with a megasporangium

e) a plant with swimming sperm

f) a plant with endosperm

2. Which of the following structures is a fruit, and which is made up of non-reproductive (in other words, vegetative) tissue?

a) cabbage

b) green bean

c) bell peppers

d) potato

e) acorn

f) celery

g) watermelon

h) corn kernels

i) carrot

j) onion

k) avocado

3. For each of the examples below, name a structure that will form as a result of mitosis and/or cell differentiation:

Example: megaspore → embryo sac

a) generative nucleus →

b) microspore →

c) zygote →

d) prothallus →

e) anther →

f) ovule →

4. Does an angiosperm absolutely require sepals and petals for reproduction? What function do petals typically serve in the plant life cycle?

5. What is the fundamental difference in how angiosperms disperse new individuals vs. how ferns disperse new individuals? What is the ploidy level of the structure that is dispersed in each case? 

6. What is the ploidy level of the following tissues: seed coat, embryo, endosperm, pericarp? Which of these 4 tissues is derived from the tissue of the mother plant?

7. Why do seeds typically contain nutritive tissue such as endosperm? 

8. Animals are critical to the life cycles of many flowering plants. What are two points during the life cycle of flowering plants when animals are often needed?

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