________ is a neurotransmitter released at every neuromuscular junction (the junction of a motor neuron and a skeletal muscle cell), where it triggers contraction of voluntary (skeletal) muscles
Fill in the blank(s) with correct word
Acetylcholine
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Which of the following best describes the ploidy level of the cells found in a fertilized embryo sac?
A) All cells are diploid. B) All cells are triploid. C) All cells are polyploid. D) The ploidy level varies among species. E) There are haploid, diploid, and triploid cells.
When scientists experimentally simulated conditions near a hydrothermal vent, _____ appeared within a week
a. cells b. nucleic acids c. hydrocarbons d. amino acids e. lipid membranes
If vitamins help molecules reduce the activation energy for necessary chemical reactions, what is their role within the cell?
A) minerals B) leptin C) coenzymes D) enzymatic inhibitors
An "S" shaped curve would be indicative of ________ growth
Fill in the blank(s) with correct word