How do archaeans and bacteria differ?

A. Size
B. Shape
C. Plasma membrane composition
D. Absence of a nucleus
E. Mode of cellular division


Answer: C

Biology & Microbiology

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Mussels and sponges sometimes contain methanotrophs as intracellular symbionts because the methanotrophs

A. allow the partnership to use hydrogen sulfide as a source of electrons. B. remove otherwise toxic levels of methane from the environment. C. convert methane to carbohydrate for use by the host. D. All of the choices are correct.

Biology & Microbiology

A population consists of ________

A) living and nonliving components B) interacting populations C) a group of interacting individuals of one species D) a group of interacting individuals from different species

Biology & Microbiology

If an individual is heterozygous for a particular trait, the gametes that individual produces will contain 3/4 dominant and 1/4 recessive alleles.

Answer the following statement true (T) or false (F)

Biology & Microbiology

Failure of the organs in the vestibular apparatus to function correctly can cause ____.

A. insensitivity to touch B. loss of hearing C. motion sickness D. inability to smell E. night blindness

Biology & Microbiology