25) one important difference between the anatomy of roots and the anatomy of lea
ID: 270500 • Letter: 2
Question
25) one important difference between the anatomy of roots and the anatomy of leaves is that
A) only leaves have phloem and only roots have xylem
b) root cells have cell walls and leaf fells do not
C) a waxy cuticle covers leaves but is absent from roots.
d) vascular tissue is found in roots but is absent from leaves
e) leaves have epidermal tissue but roots do not
26) a person working with plants may reduce the inhibition of apical dominance by auxin via which of the following?
A) pruning shoot tips
B) deep watering of the roots
c) fertilizing
D) treating the plants with auxin
E) feeidng the plants nutirents
27) as a youngster, you drive a nail in the trunk of a young tree that is 3 meters tall. The nail is about 1.5 meters from the ground. Fifteen years later, you ruturn and discover that the tree has grown to a height of 30 meters. About how many meters above the ground is the nail?
A) 0.5
B) 1.5
C) 3.0
D) 15.0
E) 28.5
2. you discover a new animal that you suspect may be a sponge. You note it is neither diploblastic nor triploblastic. You would also not that is
A) has no spicules
B) has no collar cells.
c) has no true tissue
d) has no osculum.
3) which characteristic would be a common and uninformative characteristic when trying to distinguish between a cnidarian and a planarian?
A) dorsoventrally flattened body
B) radial symmetry
C) a centralized, ladder-like nervous system.
D) single opening to the digestive system
4) an animal’s inputs of energy and materials would exceed its outputs
A) if the animal is an endotherm, which must always take in more energy because of its high metabolic rate.
B) if it is growing and increasing its mass.
c) if it tis hibernating.
d) never, homeostasis makes these energy and material budgets always balance.
5) while sampling marine plankton in a lab, a student encounters large numers of fertilized eggs. The student rears some of the eggs in the laboratory for futher study and finds that the blastopore becomes the mouth. The animal has a single continuous shell which spirals and a radula. These eggs belonged to a
A) claim
b) squid
c) chiton.
d) snail
Explanation / Answer
25. C) a waxy cuticle covers leaves but is absent from roots.
Only leaves have waxy cuticle to protect it from dry climate.
26. A) pruning shoot tips
auxin is present in shoot tip by trimming the shoot tip may reduce inhibition by apical dominance.
27. B) 1.5
Trees grow from the top and not from the base.
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