The waterproof cuticle covering the epidermis of land plants helps prevent dehydration, much like the skin of some land animals. As a consequence of having a cuticle, what other evolutionary adaptation was important for most land plants?
A. the endodermis in the root
B. root hairs on the root epidermis
C. collenchyma fibers just beneath the surface of the epidermis
D. stomata in the leaves
E. trichomes on leaf surfaces
D. stomata in the leaves
The cuticle is a waxy coating of a leaf. Although the cuticle is an effective way to reduce water loss, it can interfere with the exchange of gases (carbon dioxide into the leaf, oxygen out of the leaf). So stomata, small pores in the leaf epidermis were another necessary evolutionary adaptation for land plants.
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The connection that exists between genes and hereditary traits is based on using the information encoded in genes to synthesize
A. codons. B. nucleotides. C. proteins. D. histones. E. complementary bases.
When ____ is incorporated into DNA or RNA during synthesis, it will create a(n) ____
a. carbon; base analog b. oxygen; base analog c. 5-bromouracil; nucleotide substitution mutation d. 5-bromouracil; frameshift mutation e. oxygen; nucleotide substitution mutation
Which biochemical would least likely be detected in the stomach contents of a carnivorous dinosaur?
a. Protein b. Amino acids c. Starch d. Sugar
Of the following, which is not a characteristic of protists?
A. They have membrane-bounded organelles. B. They have a nucleus. C. They are prokaryotes. D. They are eukaryotes. E. All of the answer choices are correct.