Because the snails blend in with the light filled environment which allows them to blend in
The non- living things that marine biologist study is everything from algae to the largest whale.Basically anything in the ocean, living or not they will still study them.
<span> One reason farmers often choose GM crops over non-GM crops is because GM crops are able to produce more yield. When farmers use GM crops, there are many benefits that they could gain. It has been proven that GM crops are more resistant to pests, and other harmful substances, which also reduce the costs for pesticides and crop-maintenance. Since GM crops are more resistant to harmful substances, more of them can be used by farmers.</span>