A large molecule whose subunits consist of a sugar and a nitrogenous base is called a ____
a. nucleoside
b. nucleotide
c. nucleic acid
d. nucleosome
e. nuclear unit
ANSWER: a
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After a young woman suffered a traumatic brain injury, she seemed clumsy and out-of-sorts. She was given a visual acuity test (the assessment for glasses) and general eye health exam, and her eyes were deemed healthy. Would these assessments be adequate to rule out any visual impairment resulting from the brain trauma?
_____ Yes, her clumsiness is more likely attributable to inner ear damage. _____ No, a neurological examination of her visual processing pathways would be necessary.
The __________ prevents food and fluids from
entering the __________. a. epiglottis; larynx b. pharynx; larynx c. epiglottis; esophagus d. pharynx; trachea e. larynx; pharynx
Concerning the sex chromosomes, which of the following is correct?
a. The Y chromosome carries a greater number of nonsexual traits. b. X and Y are different in size but carry nearly equal numbers of genes. c. The X chromosome carries more genes for nonsexual traits. d. The X chromosome carries only gender-related genes. e. The X chromosome carries the SRY gene.
Which of the following is the best definition of parthenogenesis?
A) The combining of genetic material from two parents to produce genetically different offspring B) A single organism producing both eggs and sperm and fertilizing itself C) The creation of new organisms from body parts that have been pinched off from the parent D) Gametes from the male developing into new offspring without combining with an egg E) Eggs from a female developing into offspring without being fertilized