<span>There are many indicators for predator presence. Some of them are:
Being able to spot predator marks like scratches or fur.
Being able to feel predator movements.
</span><span>Echo-location </span>For example, moths respond to the echo-location calls from their bat predators; moths drop to the ground once they hear the sound pulse from the bat.
<span>An element is a pure substance that cannot be broken down into anything simpler by physical or chemical means.</span>
Answer:
Biogeochemical cycle is one of the several natural cycles, in which conserved matter moves through biotic and abiotic parts of a ecosystem. In biology, conserved matter refers to the finite amount of matter, in the forms of atoms, that present within the earth.
Explanation: It is true that the chemical is one of the natural cycles within earth
Answer:
It is a change from one form to another. Or unit to another
Answer:
Gills
Explanation:
Sharks are fishes and thus have gills through which they absorb oxygen from the water.
On the other hand, Whales being mammals use lungs to breathe. They can’t directly obtain oxygen from water.
