The type of wood containing fibers and vessels

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Reference no: EM133933011

Questions

1. The type of wood containing fibers and vessels.

A. softwood

B. hardwood

C. heartwood

D. sapwood

2. The light outer region of the wood that contains living parenchyma and water filled tracheary elements.

A. softwood

B. hardwood

C. heartwood

D. sapwood

3. Which of the following comprise the secondary phloem in conifers?

A. contain sieve cells, albuminous cells, non-conducting parenchyma and fibers.

B. contain sieve tube members, companion cells, parenchyma cells, fibers and sclereids

C. sieve areas located predominantly on sieve plates

D. contain tracheary elements, non-conducting parenchyma and fibers.

4. Which of the following describes the secondary xylem of Tilia sp.?

A. softwood

B. hardwood

C. sapwood

D. heartwood

5. The age of a tree may be determined from growth rings that reflect:

A. heartwood and sapwood

B. early wood and late wood

C. pattern of sec. xylem and phloem

D. hardwood and softwood

6. The part of the wood that serves as a dumpsite for some of the trees' waste products.

A. sap wood

B. heart wood

C. hardwood

D. soft wood

7. Which of the following comprise the conducting tissues of hardwoods?

A. tracheids only

B. vessels only

C. vessels and fibers

D. tracheids and vessels

8. Which of the ff. is not a characteristic of the phellem?

A. uniform in shape

B. non living tissues

C. lack intercellular space

D. cutinized

9. Wood with thick cell walls, small lumen and contain many fibers is classified as

A. light wood

B. heavy wood

C. hardwood

D. softwood

10. Wood type containing primarily tracheids is considered:

A. fine wood

B. coarse wood

C. hardwood

D. softwood

11. Which is not a characteristic of the gymnosperm wood.

A. presence of vessels and fibers

B. presence of tracheids

C. presence of ray parenchyma

D. single layer of xylem rays

12. Which of the ff. best describes the secondary phloem in dicots:

A. contain sieve cells, albuminous cells, non-conducting parenchyma and fibers.

B. contain sieve tube members, companion cells, parenchyma cells, fibers and sclereids

C. sieve areas located predominantly on sieve plates

D. contain tracheary elements, non-conducting parenchyma and fibers

13. Which of the following tissues comprise the bark of a tree?

A. Secondary phloem

B. periderm

C. cork cambium

D. all of the choices

14. Secondary xylem and phloem are produced in a root by what specific tissue?

A. Pericycle

B. endodermis

C. vascular cambium

D. apical meristem

15. This is the region between the vascular bundle in the wood tissue.

A. endodermis

B. medullary ray

C. pericycle

D. phloem fiber cap

16. This is the oldest part of the wood as seen in the cross section.

A. Sap wood

B. hardwood

C. heart wood

D. soft wood

17. What is the fate of primary xylem in a dicot root showing extensive secondary growth?

A. It is retained in the center of the stem axis

B. It gets crushed

C. May or menot get crushed

D. It gets surrounded by primary phloem

18. Which of the following is true of the vascular cambium?

A. it produces ray cells towards the outside and phloem towards the inside.

B. It produces phloem towards the outside and xylem towards the inside.

C. It produces xylem towards the outside and phloem towards the inside.

D. It produces xylem towards the outside and ray cells towards the inside.

19. Which of the following is true of cells surrounding lenticels?

A. They are compact and suberized.

B. They are loose and suberized.

C. They are compact and lignified.

D. They are loose and lignified.

20. Which of the following is classified as soft wood?

A. Pinus

B. Aristolochia

C. Tilia

D. Helianthus

21. Which of the following supports the downward growth of roots?

A. Gravity sensing cells are present in the root cap.

B. Pericyle of the root enables it to grow deep into the soil.

C. Upward growth of roots are repelled by air.

D. All of the above

22. Which part delimits the cortex of the root from the vascular cylinder?

A. pericycle

B. endodermis

C. stele

D. epidermis

23. Which of the following is true of passage cells?

A. The cells are without suberin coating.

B. They comprise the endodermis of the cortex.

C. They block the entry of water to the stele.

D. All of the above

24. Which part of the monocot root in the cross section is absent in dicot roots?

A. cortex

B. endodermis

C. pith

D. pericycle

25. Which of the following incorrectly describes the cells of the meristematic region in the Allium cepa root longitudinal section?

A. located above the root cap

B. compose of cubical or rectangular cells

C. located below the region of elongation

D. compose of elongated cells

Reference no: EM133933011

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