The alkali metals in group l of the periodic table all have a single electron in the outermost shell. These metals form covalent bonds with for example the halogens, which have 7 electrons in their outer shell.
When the alkali metal halide, such as KCl is dissolved in water, it dissociates into ions. The K atom loses the single electron, and therefore has a positive charge. In turn, the chloride atom gains the electron and becomes the negatively charged chloride ion.
Answer:B6 and B12.
Explanation:
Homocysteine is an amino acid produced from demethylation of methionine.The later is an amino acid needed in the body which must be conserved.
In order to conserve it ,Homocysteine is recycled in a specific pathways which inovles activities of Vitamin B6 and B12
.Therefore deficiency of these vitamins leads to elevated levels of Homocysteine.
HIGH LEVELS OF HOMOCYSTEINE AFFECT THE ENDOTHELIAL CELLS ;LEADING TO ABNORMAL CLOTTING OF BLOOD.THIS INCREASE IN BLOOD VISCOSITY PUT THE HEART AT RISK OF CARDIOVASCULAR DISEASES.
Answer:
A fever is a temporary increase in your body temperature, often due to an illness. Having a fever is a sign that something out of the ordinary is going on in your body.
Explanation:
Explanation:
Two characteristics are used to define the mammal class. They are mammary glands and body hair (or fur). Female mammals have mammary glands.
Answer:
Archaic Homo sapiens
Explanation:
The evolution of modern species is studied through the fossils found in various parts of the world.
The <em>Homo erectus </em>is the first hominin species which possessed human-like characteristics like bipedalism and they appeared about 2 mya. The first evidence of <em>Homo sapiens</em> fossil belonged to about 1,60000 years ago.
In between them, scientists found some fossils which possess characteristics of both Homo erectus and Homo sapiens, therefore, these fossils were called archaic Homo sapiens. These fossils dated about 300000 years ago.
Thus, Archaic Homo sapiens is correct.
