Osteoartheritis is when what happens?
What will be an ideal response?
Answer: Cartilage goes away and bone rubs against bone
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Peptide bond formation is catalyzed by the enzymatic activity of an RNA molecule
A. true B. false
Stramenopiles are unique in that they possess:
A. double plastids B. hairy flagella C. alveoli D. flexible protein ribbons beneath the plasma membrane E. calcium carbonate crystals
The most accurate description of SPATIAL summation is
A. Several inputs from DIFFERENT presynaptic cells create EPSPs that sum together to bring the neuron over the threshold for an action potential. B. Several inputs from the SAME presynaptic cell arrive in rapid succession, summing into a larger depolarization that brings the neuron over the threshold for an action potential.
An endosperm develops when the
a. pollen grain begins to form. b. pollen grain sticks to a stigma. c. sperm fertilizes the central cell. d. sperm fertilizes an egg