Which statement about the macronucleus and the micronucleus of ciliates is correct?
A. The micronucleus is formed by fission of the macronucleus.
B. The macronucleus is diploid and the micronucleus is haploid.
C. The macronucleus forms by the fusion of micronuclei from two different mating types.
D. The micronucleus transmits genetic information through mitosis and meiosis, while the macronucleus maintains routine cellular functions.
Answer: D
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Which characteristic of the light absorbing regions of chlorophylls and carotenoids most likely accounts for the ability
of these molecules to absorb light?
a. ringed structures b. the presence of aldehyde side-groups c. the presence of magnesium d. an extensive network of double bonds e. long hydrocarbon chain
An animal behavior, such as a bear entering a campground more often because it finds food around camping people, is an example of
A. operant conditioning. B. reflex. C. imprinting. D. taxis. E. an innate behavior.
The exoskeleton of arthropods is composed of chitin
____________________ Indicate whether the statement is true or false.
The Greek terms for "different" and "food" are the root words for
A. autotroph. B. heterotroph. C. microsphere. D. coacervate. E. liposome.