Which of the following are adaptations to land of both gymnosperms and angiosperms but are lacking in ferns and mosses?
a. pollen and seeds
b. fruits and flowers
c. vascular system
d. true roots, stems, and leaves
e. spores
A; Both gymnosperms and angiosperms have pollen and seeds. Ferns and mosses are lacking both. Only angiosperms contain fruits and flowers. All but mosses have a vascular system and true roots, stems, and leaves. All plants produce spores.
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In bone, crystals of calcium phosphate impregnate the extracellular matrix containing fibers of
A. troponin. B. myosin. C. actin. D. chitin. E. collagen.
Why is morphological convergence not a good explanation for vertebrate forelimbs? What will be an ideal response?
The protein shown being synthesized during the animation is:
A) a histone protein. B) chaperone. C) RNA polymerase II. D) myosin. E) actin.
Your botany instructor likes to tell nerdy jokes, like this: "I wanted to buy a pink Toyota Corolla, but the dealer only had a green Calyx available." Impress your instructor with a clever response to this joke.
A. "Those are great cars, but the pinecone tires don't roll very well." B. "Oh, I would have chosen the blue Receptacle." C. "Me too! But I could only afford the yellow Androecium." D. "The factory must have run out of class A genes."