________ 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

Biology & Microbiology

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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.

Biology & Microbiology

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

Biology & Microbiology

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

Biology & Microbiology

An "S" shaped curve would be indicative of ________ growth

Fill in the blank(s) with correct word

Biology & Microbiology