Cyanobacteria also known as one of the first organism on earth are responsible for producing nearly 80% of the oxygen on earth.
The scientific process is important when learning about diseases because it allows to obtain reliable and valid knowledge about the different existing diseases,
The inactive X is called also as Barr body. It stains much darker than the other chromosomes because of the fact that it is inactive. By being inactive it means that the chromatin of that chromosome is very compact because it is not used for gene expression. Being so compact, all the staining is concentrated creating a darker body.
<h3>The anandromous stickleback fish posses lots of spike and plates for protection.</h3>
Explanation:
D. Both A and B
The anandromous stickleback fish has a protective armour in the form of lots of spikes and full armoured side plates. Whenever chased by a predator it spreads its plates and spine . As a result , the predator could not swallow it or tears its jaw injuring itself.
look at the photo, it wouldn't let me type it, sorry :-/