Botany Lec 112 Quiz (Tues)

Internal structure of Leaves - Leaf Venation

Somewhat parallel vein sections; forming a "Y"; found in Gingko trees

• Reticulate Venation

• Dichotomous Venation

• Parallel Venation

• Conifer Venation

Internal structure of Leaves - Leaf Venation

Somewhat parallel vein sections; forming a "Y"; found in Gingko trees

• Reticulate Venation

• Dichotomous Venation

• Parallel Venation

• Conifer Venation

Function of Leaves - Photosynthesis/Respiration:

A. During respiration of leaves; H2O and CO2 are used and oxygen is released.

B. Photosynthesis requires light whereas respiration occurs in both the light and the dark.

• Only A is correct.

• Only B is correct.

• A + B are correct.

• None are correct.

Internal Structure of Leaves - Epidermis:

A. The lower epidermis has thick cuticle

B. High stomata counts in the upper epidermis prevent rapid transpiration.

• Only A is correct.

• Only B is correct

• Both are correct.

• Both are incorrect.

Internal Structure of Leaves - Stomata:

In the presence of light, guard cells ______.

• absorb water causing the stomates to open

• become inactive causing stomates to close

External Anatomy of Leaves:

A. The stalk of the leaf is also called the petiole

B. The petiole of a leaf is a the growth region of the stem where new shoots arise.

• Only A is correct.

• Only B is correct.

• A + B are correct.

• None are correct.

External Anatomy of Leaves:

A. Axillary buds are baby leaves/stems.

B. Stipules are leaflike outgrowths at the petiole's base.

• Only A is correct.

• Only B is correct.

• A + B are correct.

• None are correct.

External Anatomy of Leaves:

A. The edge of a leaf is known as the margin of the leaf.

B. The vascular bundle that runs from the base of the leaf to the apex is the midrib.

• Only A is correct.

• Only B is correct.

• A + B are correct.

• None are correct.

External Anatomy of Leaves - Monocot Leaves:

The area between leaf blade and sheath

• Auricle

• Collar

• Ligule

• Sheath

External Anatomy of Leaves - Monocot Leaves:

A part of the leaf that encases the stem

• Auricle

• Collar

• Ligule

• Sheath