A flap of tissue called the __________ directs air through the __________, the opening to the
__________ (windpipe). Fill in the blank(s) with the appropriate word(s).
epiglottis; glottis; trachea
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In which order were the key features of complex multicellularity likely to have appeared?
A. cell adhesion, cell communication, regulated growth and development B. cell communication, cell adhesion, regulated growth and development C. regulated growth and development, cell communication, cell adhesion D. regulated growth and development, cell adhesion, cell communication
A coral species that currently inhabits a single reef off the coast of Indonesia would be considered
A. vestigial. B. a transitional form. C. endemic. D. exotic.
Which contraceptive approach is least effective?
a. abstinence b. tubal ligation c. vasectomy d. hormonal implant e. rhythm method
What are the two common patterns of chromosome segregation seen in the tetravalent structures found in translocation heterozygotes?
What will be an ideal response?