According to one of the main hypotheses for the origin of life, what must have come first?
A. abiotic synthesis of organic monomers
B. joining of small molecules to produce macromolecules
C. packaging of molecules into pre-cells
D. formation of replicating molecules that made inheritance possible
A. abiotic synthesis of organic monomers
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Spicy is not a basic taste category identified in humans
1.True 2.False
Herbivory does not affect a plant's ability to survive
Indicate whether the statement is true or false
Which of the following characteristics helps differentiate between a monocot and a dicot?
A) Presence or absence of pollen grains B) Presence or absence of an apical meristem C) Seeds covered by a fruit D) Number of flower parts E) Presence of vascular tissue
Which of the following is true about phospholipid bilayers?
A. The hydrophobic head faces the cell exterior. B. The polar heads face the cell interior and exterior. C. The hydrophobic tail faces the cell interior. D. The polar tails face the cell interior and exterior. E. The interior of the layer is highly hydrophilic.