Autocrine signaling is a form of cell signaling in which a cell secretes a hormone or chemical messenger (called the autocrine agent) that binds to autocrine receptors on that same cell, leading to changes in the cell.
Sponges generally require a solid support for attachment, they are often found in rocky marine areas or on the ocean floor. Sponges are critical components of the ecosystems of coral reefs, where they provide shelter for a variety of organisms including shrimp, crabs, and algae.
3: because each vaccination has a different purpose. There's hundreds of different vaccines for different diseases. But 1 vaccine only works for a certain disease. Not ALL diseases.
Based on the traditional definition of species, bacterial species cannot be defined readily, due to the fact that they do not mate.
<h3>Why does the typical definition of a species not fit bacterial species?</h3>
The definition of species is that a species is one with distinct characteristics that produce viable offspring when mated with another organism in the same species.
This definition of a species does not fit bacterial species because bacterial species do not mate or reproduce se×ually.
Bacterial species reproduce by other means that do not involve mating such as by binary fission.
Therefore, based on the traditional definition of species, bacterial species cannot be defined readily, due to the fact that they do not mate.
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