A) weapons for an evolutionary arms race w/ disease causing organisms
Answer:
A <u><em>receptor</em></u> is a protein that recognizes and responds to a signal.
Explanation:
A receptor is a protein molecule present on the cells on which the signalling molecules can bind and generate a physiological response. Some receptor molecules can also respond to Sun and light. Each type of cell has specific receptors molecules and hence can respond to specific signals. The receptor molecules hence tend to receive signals for a cell. Molecules such as hormones bind to the receptors.
<span>the plant has to need something from the animal and the animals to need something from the plant.</span>
in a community there are people right? well in an ecosystem there are animals and organism.
