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
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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.
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
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)
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