Answer:
4
Explanation:
Animals have four types of cells within their bodies; epithelial, connective, muscle, and bone.
Predation: In predation, one species kill and feeds on another species.
4.54 billion years<span>The "best" age for the Earth is based on the time required for the lead isotopes in four very old lead ores (galena) to have evolved from the composition of lead at the time the Solar System formed, as recorded in the Canyon Diablo iron meteorite. This "model lead age" is <span>4.54 billion years</span></span>
