Question

1. what are the two main parts of most leaves? (slide 12)
2. 2.
3. list at least six of the different shapes of leaves? (slide 13)
4. 2.
5. 4.
6. 6.
7. why are shade leaves usually broad and have lots of surface area? (slide 13)
8. 2.

Explanation:

For question 21, based on plant morphology, the two main parts of most leaves are the blade (which is the flat, expanded part for photosynthesis) and the petiole (the stalk that attaches the blade to the stem). For question 22, common leaf shapes include oval (e.g., magnolia leaf), heart - shaped (e.g., ivy leaf), lanceolate (e.g., willow leaf), round (e.g., lily pad), needle - like (e.g., pine tree leaf), and lobed (e.g., oak leaf). For question 23, shade leaves are broad with lots of surface area. This is because in shaded environments, there is less light available. A larger surface area allows the leaf to capture more of the limited light for the process of photosynthesis.

Answer:

21.

1. Blade
2. Petiole

22.

1. Oval
2. Heart - shaped
3. Lanceolate
4. Round
5. Needle - like
6. Lobed

23.

1. To capture more light in shaded environments.
2. Because photosynthesis requires light and a larger surface area increases light - gathering capacity.