The molecule of the extracellular matrix of animal cells that is associated with joint lubrication and friction reduction is
A) glycosaminoglycan.
B) proteoglycan.
C) hyaluronate.
D) pectin.
E) fibronectin
E) fibronectin
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In some species, the sex of the future individual is determined by environmental conditions and not by sex chromosomes. Which species determines its sex by temperature?
a. birds b. fruit flies c. frogs d. rabbits e. zebras
The ________ gene is responsible for removing many of the drugs introduced into the human body
A) HAR-1 B) CYP2D6 C) ASPM D) FOXP2 E) BRCA1
Cultivated wheat is descended from three distinct species, each with a diploid set of 14 chromosomes. Thus, it is
A) an allotriploid with 21 chromosomes. B) an allotriploid with 42 chromosomes. C) an allohexaploid with 84 chromosomes. D) an allohexaploid with 42 chromosomes. E) an autotetraploid with 28 chromosomes.
Characteristics of eudicots include all EXCEPT
A. woody or herbaceous plants. B. flower parts in fours and fives. C. leaves with netted veins. D. vascular bundles arranged irregularly in the stem. E. two cotyledons.