Which group of gymnosperms resembling small palms produce pollen and gametophytes on separate male and female plants, are usually pollinated by beetles?
A. Ginkgos
B. Gnetophytes
C. Ferns
D. Cycads
E. Ephedras
Answer: D. Cycads
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A new antibiotic is able to bind the rho (?) factor associated with some transcription processes; as a result this antibiotic would affect
A) initiation of transcription. B) elongation of transcription. C) binding of the RNA polymerase. D) termination of all transcription. E) termination of some transcription
The idea of spontaneous Generation postulated that
A. organisms could evolve into the next generation of organisms. B. organisms could spontaneously combust. C. organisms could spontaneously arise from other living organisms. D. living organisms could spontaneously arise from non-living material.
Which country has the biggest ecological
footprint?
a. France b. United States c. China d. India e. Canada
Phospholipids are large organic molecules with a ________, polar phosphate head connected to ________, nonpolar fatty acid tails. How do these molecules arrange themselves to form a mostly impermeable barrier between a liposome and its environment?
a. hydrophilic; hydrophobic; They line up hydrophilic head to hydrophilic head with the tails all facing outward from the center line of the membrane. b. hydrophilic; hydrophobic; They line up hydrophobic tails facing each other at the center line of the membrane with the hydrophilic heads facing outward, away from the center line of the membrane. c. hydrophobic; hydrophilic; They line up hydrophobic tails facing each other with the hydrophilic heads facing outward, away from the center line of the membrane. d. hydrophobic; hydrophilic; They line up hydrophilic head to hydrophilic head with the tails all facing outward from the center line of the membrane.