Plants Biology

Which statement is true about guard cells

• Guard cells have chloroplasts. They control the opening and closing of the stomata

• Guard cells do not have chloroplasts. They control the opening and closing of the stomata

Which statement about the internal structure of the leaf is true

• There are less chloroplasts in the palisade mesophyll than spongy mesophyll

• All cells in the leaf have chloroplasts

• There is a thin film of moisture surrounding the spongy mesophyll

• There are more stomata on the top side of the leaf than the under side.

Tags

NGSS.MS-LS1-6

NGSS.MS-LS1-2

Which are factors affecting the rate of photosynthesis? (There are 3 correct answers)

• Oxygen concentration

• Carbon dioxide concentration

• Temperature

• Light intensity

Tags

NGSS.MS-LS1-6

The diagram shows a plant cell. Which energy conversion happens in structure X?

• chemical energy to light energy

• heat energy to chemical energy

• heat energy to light energy

• light energy to chemical energy

Tags

NGSS.MS-LS1-6

A  plant has variegated leaves. After placing the leaf under sunlight for 12 hours, the leaf is cue into portions 1-4. These leaf portions are tested for starch. In which portion of the leaf is starch found?

• 1 only

• 1 and 2

• 2 only

• 3 and 4

Tags

NGSS.MS-LS1-6

State the name of structure 1

Tags

NGSS.MS-LS1-6

NGSS.MS-LS1-2

What is the limiting factor(s) of photosynthesis at region 1 of the graph?

• light intensity

• carbon dioxide concentration

• temperature

• light intensity

Tags

NGSS.MS-LS1-6

Which statement is true at part 2 of the graph?

• light intensity is a limiting factor

• light intensity is no longer the limiting factor

Tags

NGSS.MS-LS1-6

How does carbon dioxide enter the leaf?

• Carbon dioxide enters by osmosis through the stomata of the leaf

• Carbon dioxide enters by diffusion through the stomata of the leaf

• Carbon dioxide enters by dissolving through the guard cells of the leaf

• Carbon dioxide enters by diffusing through the guard cells of the leaf

Tags

NGSS.MS-LS1-6

Which statement correctly describes how the leaf is adapted for photosynthesis?

• It has a thin lamina that provides a lage surface area to absorb maximum sunlight

• It has phloem that transports food from the rest of the plant to the leaf

• It has a petiole that holds the leaf in position to absorb maximum sunlight

• It has a waxy cuticle that is thin and allows a short diffusion distance for gases to reach all mesophyll cells