What trophic level is the western diamond rattlesnake

This is a situation in which genes are attached to an organism's sex chromosomes; the sex of an organism influences the expression of a gene.

What is the term for a water wave that is created by an underwater earthquake?

Which of the following is a reason why early living organisms on earth could not have survived on the surface? 1. the lack of an ozone layer 2. the lack of oxygen in the atmosphere 3. the fact that these organisms were single-celled