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
men who exercise don t just get themselves fit their sperm swim faster too men who are hoping to have children in the future would do well to get to the gym after a study found exercise could help their sperm to swim faster researchers found men who worked out more had faster swimming sperm that was better formed compared to their sedentary peers they suggest that exercise promotes healthy hormone levels that create a better environment in the testes for sperm production