A more stringent definition is agamogenesis which is reproduction without the fusion of gametes<span>. Asexual reproduction is the primary form of reproduction for single-celled organisms such as the </span>archaebacteria<span>, eubacteria, and protists. Many plants and fungi reproduce asexually as well.</span>
The elements are pure forms of matter that cannot be broken down into simpler substances.
Answer:
Birds have remarkably specialized bones that are pneumatic, because they are full of air sacs that provide a continuous flow of breath throughout their bodies. In short, their lungs are essentially hooked up to their bones.
Let's say you have a person with Aa and a person with Aa