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
On my Master's swim team, the slow lane (where I swim) does about 1000 yds per half hour if we're swimming freestyle (fewer yds for other strokes per half hour). The fastest lane does 1000 yds in 20 minutes or less. So my lane aims for 4,000 yds in 2 hrs, while the fast lane aims for 5,000+.