1. In a plant’s stem, the vascular tissue (1 point)
is always arranged in rings of vascular bundles.
is continuous from the roots to the leaves.***
carriest nutrients up the stem but not down.
plays a role in photosynthesis and storage.
2. Many cacti, such as saguaros and barrel cacti, have large stems and no leaves. What function of leaves is taken on by the stems of such cacti? (1 point)
They produce food by photosynthesis.
They absorb water and nutrients from the soil.
They transport materials throughout the plant.
They store excess water.***
3. Most of the photosynthesis in plants takes place in the (1 point)
mesophyll.
guard cells.
stomata.***
xylem.
4. The flat structure of a leaf blade enables its function as a photosynthetic organ by (1 point)
decreasing the loss of oxygen into the atmosphere.
increasing the absorption of nutrients from soil.
protecting the rest of the plant from water loss due to evaporation.
exposing a greater surface area to capture energy from sunlight.***
9 answers
2. A - They produce food by photosynthesis
3. A - mesophyll
4. D - exposing a greater surface area to capture energy from sunlight
5. B - B and C
BAADB
B
A
A
D
B
0 answers