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 cells 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
C
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The melon of dolphins and other toothed whales is used for:
a. storage of food. b. protecting the brain. c. focusing sound pulses. d. receiving sound pulses. e. producing sounds.
Which of the following is not a part of the whole genome shotgun method of genome sequencing?
1.The entire genome is broken up into random overlapping pieces. 2.Each fragment is cloned. 3.Each fragment is sequenced. 4.The genome sequence is assembled by computers. 5.Northern blots are performed.
Ovules mature into , while ovaries mature into
a. seeds/fruits. b. stamens/seeds. c. seeds/carpels. d. fruits/seeds.
Which of the following does not pertain to helminths?
A. parasitic worms B. eggs and sperm for reproduction C. in kingdom Protista D. have various organ systems E. often alternate hosts in complex life cycles