When sound waves hit a solid surface they either reflect, refract, or absorb.
Echo's are caused by the reflection of sound waves.
Answer:
C
Explanation:
Animals get nitrogen by eating plants or other animals that contain nitrogen. Wen organisms die, their bodies decompose bringing the nitrogen into soil on land or into the ocean. Bacteria alter the nitrogen into a form that plants are able to use
Answer:
Hey i think there is an error in ur question, u may recheck the so called word "metopus"
But here is the definition of Endosymbionts are organisms that form a symbiotic relationship with another cell or organism
A secondary source is anything written after the fact
