Algae with two flagella are
A. diatoms.
B. dinoflagellates.
C. cyanobacteria.
D. red algae.
B. dinoflagellates.
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What is the proper sequence of air flow in the human respiratory system?
a. nasal cavities, larynx, pharynx, bronchi, trachea b. nasal cavities, pharynx, bronchi, larynx, trachea c. nasal cavities, pharynx, larynx, trachea, bronchi d. nasal cavities, larynx, pharynx, trachea, bronchi e. nasal cavities, bronchi, larynx, trachea, pharynx
You observe a cell under a microscope and you can clearly see a cell wall, a vacuole, and cytoplasmic connections. These cytoplasmic connections must be
A) plasmodesmata. B) desmosomes. C) gap junctions. D) osmotic channels. E) tight junctions.
Islet cells in the pancreas produce which hormone(s)?
A) Each cell produces either glucagon or insulin. B) They produce insulin only. C) Islet cells do not produce hormones. D) Each cell produces both glucagon and insulin. E) They produce glucagon only.
©McGraw-Hill EducationConsider the cladogram shown. Based on this cladogram, which species has the greatest number of ancestral character states (pleisiomorphies)?
A. 1 B. 2 C. 3 D. 4 E. 5 F. 6