List the characteristics that are common to all living organisms.
What will be an ideal response?
Organisms are organized. They have the ability to acquire materials and energy. They can reproduce and grow. Organisms have an evolutionary history.
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Which of the following is not true of the lacO region of the lac operon?
A. It is the operator of the operon. B. It produces a diffusible product that can regulate the expression of the operon. C. It is bound by the Lac repressor when lactose is unavailable. D. Its mutation leads to constitutive expression of the operon.
What is the main structural component of cell membranes?
a. Polypeptides b. Triglycerides c. Enzymes d. Phospholipids
Which of the following is a common cause of otitis media?
A) Chlamydophila pneumoniae B) Mycobacterium tuberculosis C) Blastomyces dermatitidis D) Streptococcus pneumoniae E) Pneumocystis jiroveci
Why does the red queen hypothesis predict that the proportion of asexuals in a popu-lation will oscillate in the presence of parasites?
a. Asexual and parasite numbers will undergo a predator–prey dynamic without evolutionary change. b. Asexuals with parasite resistance will initially outpace the number of sexu-als. c. Sexuals are better at adapting when parasites change. d. There is a time lag between the growth of asexual lineages and the adapta-tion of parasites to such lineages. e. B, C, and D.