If all eukaryotes suddenly died off, the Earth's carbon cycle would immediately collapse and cease to exist
A. true
B. false
B
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A polypeptide is ________.
A. a long chain of amino acids B. a long chain of fatty acids C. a long chain of glucose D. a long chain of nucleic acids
In the disease myasthenia gravis, there is a deficiency of acetylcholine receptors at the neuromuscular junction. This blocks contraction by preventing muscle activation at which point?
A. generation of action potentials in the motor neuron B. opening of the T-tubule system C. release of Ca2+ from the sarcoplasmic reticulum D. altering the interaction of troponin with tropomyosin E. generation of action potentials in the muscle fiber
What is the source of the envelope in enveloped-viruses?
What will be an ideal response?
Production of sperm in males by the process of meiosis and maturation.
What will be an ideal response?