Cilia in eukaryote cells can
A. assist digestive tract cells in absorbing food molecules.
B. move in unison to establish a current to move objects, as with human eggs through the reproductive tract.
C. beat in unison to help a single cell, such as a protist, to swim.
D. add surface area for senses such as taste, smell, balance, and hearing.
E. be used in eukaryotes to do any of these functions.
E. be used in eukaryotes to do any of these functions.
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The olfactory epithelium is found in the
(a) ear. (b) nasal cavity. (c) eye. (d) tongue.
Which of the following photosynthetic pathways is ideal for desert plants?
A) CAM B) C4 C) C3 D) respiration
Clusters of phloem and xylem tissues are called
A. root tissue B. ground tissue C. pith D. vascular bundles
Which of the following is an ongoing trend in the evolution of land plants?
A) decrease in the size of the leaf B) reduction of the gametophyte phase of the life cycle C) elimination of sperm cells or sperm nuclei D) increasing reliance on water to bring sperm and egg together E) replacement of roots by rhizoids