Facilitated diffusion of substances crossing the cell (plasma) membrane takes place with the help of proteins such as channel proteins and carrier proteins.
Elbows and knees would be the answer
Here is the list of characteristics shared by living things:
<em>Cellular organization.
</em>
<em>Reproduction.
</em>
<em>Metabolism.
</em>
<em>Homeostasis.
</em>
<em>Heredity.
</em>
<em>Response to stimuli.
</em>
<em>Growth and development.
</em>
<em>Adaptation through evolution.</em>
Crossing over is the exchange of chromosome segments between non-sister chromatids during the production of gametes.
Rna =sickness and bad viruses makes you go to hospital