What structure is responsible for the exchange of gas in leaves?
a. Aerenchyme
b. Propagule
c. Lenticels
d. Stomata
d
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The biome most known for its rich, deep topsoil is:
a. tundra b. taiga c. tropical rain forest d. desert e. grassland
The Primate order arose about ____ years ago, in the ___ period.
A. 60 million; Tertiary B. 150 million; Jurassic C. 100 million; Cretaceous D. 10 million; Tertiary E. 1 million; Quaternary
When the two alleles CR CW are the genotype of an individual, that person displays features of both alleles. This is known as
A. polygenic inheritance. B. multiple alleles. C. complete recessiveness. D. codominance.
What is the route a red blood cell would take to circulate through a kidney, starting from the aorta?
A. renal artery ? afferent arteriole ? glomerulus ? efferent arteriole ? vasa recta ? renal vein B. renal vein ? efferent arteriole ? glomerulus ? afferent arteriole ? vasa recta ? renal artery C. renal artery ? afferent arteriole ? vasa recta ? efferent arteriole ? glomerulus ? renal vein D. renal artery ? vasa recta ? afferent arteriole ? efferent arteriole ? glomerulus ? renal vein E. renal artery ? glomerulus ? afferent arteriole ? efferent arteriole ? vasa recta ? renal vein F. renal vein ? glomerulus ? efferent arteriole ? afferent arteriole ? vasa recta ? renal artery G. renal vein ? vasa recta ? afferent arteriole ? glomerulus ? efferent arteriole ? renal artery