Answer:
Trace fossils may consist of impressions made on or in the substrate by an organism. For example, burrows, borings (bioerosion), urolites (erosion caused by evacuation of liquid wastes), footprints and feeding marks and root cavities may all be trace fossils.
Explanation:
The answer is actually true, because its a tiny spot in the center of the retina that contains only cones.
Answer:
Plant tissue culture is a collection of techniques used to maintain or grow plant cells, tissues or organs under sterile conditions on a nutrient culture medium of known composition. It is widely used to produce clones of a plant in a method known as micropropagation.
It really depends on a multiple of things actually : the release of a neurotransmitter from the presynaptic cell, an action potential in the presynaptic cell, and finally the presence of receptors on the postsynaptic cell. Hope this helps!