Exam 7: Leaves

Leaf mesophyll consists primarily of chlorenchyma tissue.

The opening and closing of stomata is governed by ________ levels in the guard cells.

The venation that forks repeatedly in leaves is termed

All leaves originate as primordia on the surface of the stem apical meristem.

Betacyanins are pigments that are usually red.

The spongy mesophyll is so named because it

The large cells of certain grass leaves that permit the leaves to roll up under dry conditions are

A leaf arrangement in which there are three or more leaves at a node is called

The protective layer of an abscission zone serves to prevent water loss after the leaf falls off the plant.

Which of the following specialized leaves are found in plants living in arid environments?

Leaves of ________ provide fibers for production of cordage, ropes, and other textiles.

A leaf that lacks a petiole is termed

Which is a morphological adaptation to reduce water loss from the leaf?

Typical leaves function as ________ in the plant.

Which of the following is primarily responsible for forcing water out of hydathodes?

The epidermis of leaves normally is coated with

Anthocyanins are the principal pigments responsible for yellow and orange colors in fall leaves.

Monocots generally have net-veined leaves.

Bracts are

The leaf pigments mostly responsible for gold to orange leaf colors in the fall are