Which plants are characterized by a conducting system, the possession of cuticles, specialized stems, and roots, stomata, and, in many species, seeds?
A. liverworts
B. mosses
C. tracheophyte
D. horsetails
E. club mosses
C. tracheophyte
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A pair of shared valence electrons is referred to as a(n):
A. ionic bond. B. hydrogen bond. C. van der Waals interaction. D. covalent bond. E. hydrophobic effect.
What is immunity?
a. an organism’s capacity to resist infection only b. an organism’s capacity to both resist and combat infection c. a pathogen d. an organism’s capacity to combat infection only e. a set of genetic instructions
What do seeds contain?
A. embryo and nutritive tissue B. male gametophyte and nutritive tissue C. female gametophyte and nutritive tissue D. mature sporophyte and nutritive tissue
Which of these structures is analogous in function to the tracheoles of insects?
A) Skin of an earthworm B) Body surface of a flatworm C) Bronchi of a human D) Gills of a fish