Density can be useful in identifying substances. It is also a convenient property because it provides a link (or conversion factor) between the mass and the volume of a substance. Mass and volume are extensive (or extrinsic) properties of matter - they depend on amount.
The term is normally applied to a group of between six and nine elements (boron, silicon, germanium, arsenic, antimony, tellurium, and possibly bismuth, polonium, astatine) found near the center of the P-block or main block of the periodic table.
Answer:
related with genes, microbes
Sorry If I misspell or have horrible grammar
Explanation :
Rainforests have a lot of plants and animals because ;
Climate : The rainforest(s) are in very tropical regions , meaning the recieve a lot of sunlight . The energy is stored in plant vegetation . Animals are attracted to the food and eat it .
Edit : Also I tried to put the answer I found into my own words , I noticed the 1st person copied and pasted an answer which is copying
