Characteristic of sun leaves and the xerophyte leaf

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Reference no: EM133932967

Questions

1. Which of the following can best describe the complexity of the leaves when the petioles are attached at the middle of the blade?

simple leaf
perfoliate leaf
compound leaves
peltate leaves

2. A large swollen region at the base of the petiole in the"makahiya" (touch me not) leaf is known as the:

midrib
pinnules
pulvinus
terminal tracheids

3. Which of the following best describes the mature fern frond?

open type of venation usually dichotomously branched
palmately netted venation
radiately netted venation
parallel venation

4. The part of the leaf where most photosynthetic activity takes place.

spongy parenchyma
palisade parenchyma
midrib
epidermis

5. It refers to the tight fitting parenchyma cells that surround the vascular tissues of the monocot leaf.

endodermis
bundle sheath
pericycle
vascular cambium

6. The petiole performs the following functions except

for protection from grazing animals
prevents overlapping and shading of the laminae of the leaves
for free movement of the leaves allowing them to be cooled off.
prevents insects from landing on the laminae

7. Which of the following is true of the spongy mesophyll layer of the leaves?

facilitates the circulation of gases
responsible for most photosynthetic function of the leaf
where the primary vein and veinlets are located
allows flexibility of the leaf

8. Which of the following best describes the prophylls?

are various types of tracts that accompany the flower
serves as attraction of pollinators
include the petals
protects the axillary buds

9. Which statement best characterizes primary growth?

It never occurs in leaves
It results from the activity of the vascular cambium
It produces epidermal, ground, and primary vascular tissues.
It substantially increases the girth of the plant

10. Which of the ff. characteristic is found in plants for which water conservation during the growing season is a significant problem?

thick and fleshy petiole
adventitious roots
parallel leaf venation
spines

11. Which is not a characteristic of sun leaves?

grow under low light intensity
more and longer palisade cells
with well developed vascular tissues
possess thicker cuticles

12. The following are adaptations of hydrophytes except:

absence of cuticle
unicellular epidermis with chloroplast
absence of stomata
with thicker uniformly packed cortical cells

13. The following are adaptations of desert plants except:

presence of interxylary cork rings in the cortex
photosynthetic stem
abundance of nonfunctional stomata
epidermis is multiseriate and covered by a thick cuticle

14. The slow closure and sleep movements in plants are due to special cells in the leaves and are influenced by:

photosynthesis
water distribution
turgor pressure
the closing of the stomata

15. Which is not a characteristic of the xerophyte leaf:

with large spongy mesophyll
thick walled epidermis and hypodermis
with sunken stomata
with abundant trichomes

16. Which is not a characteristic of the hydrophyte leaf:

reduced cuticle
abundance of stomata
large air spaces in the mesophyll layer
with thin walled epidermis

17. Very fine vascular bundles that run perpendicular to parallel veins in monocots

fibrovascular bundle
commissural bundle
leaf trace
fiber bundle
Other:

18. Which of the ff. is not a characteristic of a xeromorphic habitat?

water is frequently scarce
the soil is rich in organic materials
temperature varies from extreme hot to extreme cold
soil is rich in minerals

19. Which is not a characteristic of the fern leaf vascular tissue?

phloem is simple consisting of undifferentiated sieve cells
xylem consist of tracheids and vessels
vascular bundles are surrounded by an endodermis
with open type of venation

20. In this type of leaves the abaxial epidermis has more stomata as compared to the adaxial epidermis.

Horizontally oriented leaves
Pinus leaf
vertically oriented leaf
Zea mays leaf

21. The water conducting tissue of the pine tree consist of cells called

Tracheids
vessel elements
sieve tube member
sclereids

22. A plant that continues to increase in diameter yearly would be called:

herbaceous annuals
woody perennial
herbaceous perennial
woody annuals

23. Wood that contains fiber and vessels.

Softwood
Sapwood
Heartwood
hardwood

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

Softwood
Hardwood
Heartwood
sapwood

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

heartwood and sapwood
pattern of sec. xylem and phloem
early wood and late wood
none of the above

Reference no: EM133932967

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