The parathyroid gland releases a hormone that dissolves some of the calcium in bones moving it to the blood. This is a result of an increasing number of osteoclasts which results in the release of calcium ions into the bloodstream.
For natural selection to happen <span>there must be genetic variation in the population for it to even work</span>
The arctic fox is an incredibly hardy animal that can survive frigid Arctic temperatures as low as –58°F in the treeless lands where it makes its home. It has furry soles, short ears, and a short muzzle—all-important adaptations to the chilly clime. Arctic foxes live in burrows, and in a blizzard they may tunnel into the snow to create shelter.
Any medicines really. Penicillin is one of them. Cheese. Beers and wines. Those were some of the examples my class was give.
<u>Explanation:</u>
Remember, an Estuary is a term used to refer to an enclosed coastal body of slightly salty water having one or several streams or rivers flowing into it.
Found in an estuary are Nutrients (such as from decayed plants and animals) which are then released or transferred into an estuary. While the active life-forms in an estuary benefit from these nutrients during their lifetime after which when they die they become nutrients themselves.
