Component of the cytoskeleton; plays a role in the movement of the cell and its organelles; a protein filament in a sarcomere of a muscle, its movement shortens the sarcomere, yielding muscle contraction.
What will be an ideal response?
actin filaments
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Receptor potentials may generate action potentials in the receptor cell itself, or they may cause ________ that stimulates an associated neuron to generate action potentials
A) an increase in blood flow B) an influx of Cl- C) a change in pressure D) the production of glucose E) the release of neurotransmitter
Which of the following are groups of photosynthetic bacteria?
A) purple sulfur bacteria B) green sulfur bacteria C) cyanobacteria D) all of the above
How do airborne pollutants affect plant growth, and why?
a. They increase growth because particulates provide an additional carbon source b. They increase growth because the slight dimming of sunshine reduces water loss. c. They reduce growth because the chemicals cause stomata to close or clog them permanently. d. They reduce growth because polluted air has lower carbon dioxide levels.
The sum of genetic information (alleles) across all individuals in the population is referred to as the ________
Fill in the blank(s) with correct word