C. Trace Fossils.
Because these are TRAILS, and not the actual animal, these are trace fossils.
Answer:
The conditions that would cause a molecule to diffuse from outside to inside of a structure is a higher concentration of that molecule outside and the presence of a semipermeable membrane that facilitates its passage.
Explanation:
The process by which a molecule passes from a place where it is more concentrated where its concentration is lower - crossing a semipermeable membrane - is called simple diffusion.
<u>Simple diffusion is a mechanism that does not require energy and responds to a concentration gradient</u>. When a molecule is more concentrated in a space it can enter the space where it is less concentrated
.
The cell membrane is an example of a semi-permeable membrane where the simple diffusion process occurs.
Learn more:
Simple diffusion brainly.com/question/1798156
<span>Monk Parakeet
</span><span>Blue-Fronted Amazon
</span><span> Indian Ringneck
</span><span>Eclectus
</span> Budgerigar<span>
these are a few :D
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