ib biology topic 9 plant biology intro

Which of the following are transport tubes in plants?

• xylem and stomata

• phloem and cambium

• mesophyll and stomata

• phloem and xylem

In plants, organic compounds are mainly transported in which vessel?

• phloem

• roots

• xylem

• cambium

Transpiration is best described as

• the absorption of water from the soil

• the evaporation of water and its subsequent loss from the leaf

• the movement of organic compounds through the plant

• the opening and closing of stomata

In plants, water and minerals are transported through which vessel?

• phloem

• cambium

• stomata

• xylem

In the diagram of a leaf cross section, structure F refers to

• the stomata

• the mesophyll

• a pair of guard cells

• xylem

In the diagram of a stem cross section, C refers to

• mesophyll

• vascular bundle

• xylem

• root cells

In the microscope image from the leaf lower epidermis, the number of open stomata is closest to

• 3

• 6

• 9

• 12

Which one of the following correctly describes where a general process occurs in plants?

• carbon dioxide enters through the roots

• water is absorbed by leaves

• gas exchange occurs in the leaves

• sugars are actively transported from the soil