The cuticle of leaves and stems is one modification that enabled plants to move onto land
Indicate whether the statement is true or false
TRUE
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The image in the accompanying figure is an example of a(n) ____
a. random coil b. double helix c. b sheet d. a helix e. b polysaccharide
Barringer Crater in Arizona was formed when a
300,000-ton asteroid slammed into Earth 50,000 years ago. Which of the following is true about this event? a. It hit so early that it had little influence on the history of life. b. This one produced about 150 times the energy of the bomb that hit Hiroshima. c. Its impact produced a minor crater. d. Scientists recently disproved that an asteroid impacted our planet just prior to the mass extinctions at the K-T boundary. e. An asteroid impact releases only minor amounts of energy.
________ are preparations of live microorganisms fed to animals to improve intestinal biota.
A) Prebiotics B) Probiotics C) Lantibiotics D) Macrobiotics
Horizontal gene transfer is less prevalent in eukaryotic species because
A. of the multicellularity in eukaryotic species, which is lacking in prokaryotic species. B. eukaryotic species reproduce by sexual reproduction. C. of the presence of organelles and multicellularity. D. of the presence of organelles in the cells of eukaryotic species. E. of multicellularity and sexual reproduction.