Answer:
Observing and counting bird populations
Explanation:
well it is not exactly essentioal but salmon need it
<span>A narrow slab of minerals that is different from the surrounding rock is known as a Vein.
Hope this helps :)</span>
Each cell in the human body contains about 25,000 to 35,000 genes.
As soon as the neural tube is formed, the anterior<span>portion expands quicker than posterior, forming the primary brain vesicles: Prosencephalon (forebrain), Mesencephalon (midbrain), and Rhombencephalon (hind brain).</span>
