Genetic sequence data from mitochondrial and Y chromosome DNA agree that the human family is _____ and it arose _____
A. young; in Africa
B. young; in Europe
C. old; in Africa
D. old; in Europe
E. old; in many regions around the world
A
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Referring to the figure showing helper T cell function, which statements are true? (Check all that apply.)
_____ Cytokines are produced in both diagrams.
_____ Antigens play a role in both diagrams.
_____ Naïve cells are involved in diagram I.
_____ The humoral response is represented in diagram II.
People who work in department stores where
music is played constantly in overhead speakers claim they don’t hear the music. This is an example of
a. sensory deprivation. b. sensory adaptation. c. behavioral modification. d. a coordinated response. e. more than one of these
The vestibular canal contains ____, while the cochlear duct contains ____
a. endolymph; perilymph b. tympanic membrane; organ of Corti c. organ of Corti; endolymph d. perilymph; endolymph e. scala media; endolymph
Einkorn (Triticum boeoticum) is an ancient grain with a diploid number of 14 (2n = 14). Durum (Triticum turgidum) appeared later. Durum grains are larger and the plant is hardier
It has twice the genetic material of Einkorn (2n = 28 ) but contains basically the same chromosomes. Can you propose a hypothesis on how durum evolved?