Which of the following characteristics would be true of an epithelium specialized for exchange by diffusion (e.g., a respiratory epithelium)?
A. Thin with a relatively large surface area
B. Thick with a relatively large surface area
C. Thin with a relatively small surface area
D. Thick with a relatively small surface area
E. Thin with a small surface area/volume ratio
A. Thin with a relatively large surface area
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Diphtheria toxin is produced only by strains of Corynebacterium diphtheriae that are infected with a particular bacteriophage. This is an example of
A. lysogenic conversion. B. induction. C. conjugation. D. lysis.
Multi-stranded protein cords that function as cables inside of cells are the
A. microtubules. B. microfilaments. C. intermediate filaments. D. all of these are correct.
Imagine you are performing a cross involving seed color in garden pea plants. What F1 offspring would you expect if you cross true-breeding parents with green seeds and yellow seeds? Yellow seed color is dominant over green.
A. 100 percent yellow-green seeds B. 100 percent yellow seeds C. 50 percent yellow, 50 percent green seeds D. 25 percent green, 75 percent yellow seeds
Systemic infections with fungus are difficult to treat because fungi are metabolically similar to humans, so antifungal therapies are sometimes complicated by side effects.
Answer the following statement true (T) or false (F)