Egg-Laying Sharks. Of the approximately 400 species of sharks, about 40% lay eggs. This is called oviparity. When the eggs are laid, they are in a protective egg case (which sometimes washes up on the beach and is commonly called a mermaid's purse).
what s the truth i am asking this b c there seems to be posts on here that say y sperm swim faster which is what we all prob have heard for the longest time but there have been some recent posts on here that state newer studies now say y sperm aren t any faster than x and they can both swim just as fast so im just wanting to know which one is true if anyone really knows thanks
Because you burn more calories when you swim faster, covering more distance, it makes sense that the fastest swim stroke has the potential to burn the most calories. Holland says this is the freestyle stroke. But, that doesnât mean you should opt for the freestyle every time you get into the pool. As well as speed, the amount of calories you burn also comes down to duration and frequency, says Holland. âSo if you enjoy the breaststroke more than freestyle, you may swim longer and be more consistent utilizing that stroke, meaning more total calories burned.â