Which protective structure forms to protect certain bacteria during periods of harsh conditions?
A. Biofilm
B. Capsule
C. Flagella
D. Endospore
Answer: D
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The parts of the plant that absorb water and minerals are the
A. stomata. B. roots. C. flowers. D. pollen. E. cuticle.
Cables" made of microtubules that extend from the poles of a cell to the chromosomes' centromeres during cell division are called:
A.) spindle fibers B.) telomere C.) histones D.) chromatid
Which of the following statements regarding the demonstration of the etiology of disease is FALSE?
A) The suspect agent must be present in all cases of disease. B) The suspect agent must cause the disease under investigation when introduced into a susceptible host organism. C) The suspect agent must be isolated and cultured in the laboratory. D) It must be possible to reisolate the suspect agent from the infected experimental host. E) The suspect agent must be the only potential pathogen present in disease cases.
Which organism has the greatest proportion of protein-coding DNA in its genome?
A) E. coli B) human C) fruit fly D) round worm E) Arabidopsis (a plant)