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
These enzymes quickly destroy any sperm that canât swim out of the semen within a few hours. It takes approximately 72 days for sperm to mature in the body. During the last 14 days of this process, the sperm are very much alive and swimming. They are alive a long time prior to leaving a manâs body. During freezing, sperm are cooled to a very low sub zero temperature (minus 196 degrees Centigrade).