Plant Physiology Quiz 2 (14 MCQs)

Quiz Instructions

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1. This tissue is composed of mostly living cells: sieve cells in conifers and; sieve tube elements with companion cells in hardwoods:

Correct Answer: A) Functional phloem.

2. Storage, anchorage, conduction and absorption are all functions of what?

Correct Answer: C) Tree Roots.

3. A tree that keeps it's leaves for more than one year is called a what?

Correct Answer: C) Evergreen.

4. This is the primary structural component of the cell wall

Correct Answer: B) Cellulose.

5. Found in hardwoods only, these are the primary conduction elements composed of stacks of dead, hollow cells that form long tubes:

Correct Answer: A) Vessels.

6. The swollen area at the base of a branch is called the:

Correct Answer: B) Branch collar.

7. Where the branch and trunk expand against each other in the crotch and the bark gets pushed up is called the:

Correct Answer: B) Branch bark ridge.

8. Trees that form wide vessels early in the season and narrower vessels later in the season are called

Correct Answer: C) Ring porous.

9. The opening and closing of stomata are regulated by

Correct Answer: A) Guard cells.

10. The area of the leaf stalk that enables leaf drop and protects the stem from dessication and pathogen entry.

Correct Answer: C) Abscission zone.

11. This conductive tissue is composed of tracheids, fibers and parenchyma cells in gymnosperms

Correct Answer: A) Xylem.

12. The purpose of the palisade layer in the leaf is to carry out

Correct Answer: D) Photosynthesis.

13. These provide a large surface area for absorbing sunlight & CO2. They also facilitate gas exchange.

Correct Answer: C) Leaf blades.

14. These trees have only one apical meristem:

Correct Answer: D) Palms.