The tiny superscripts say how many electrons live in each orbital, the letters represent the orbitals that are available, and the big numbers say which energy level the orbitals are found in.
Answer: Option D.
Sexual isolation.
Explanation:
Sexual isolation is a process in which a species of organism is unable to breed or mate from related species successfully due to environment, physiological, behavioral or genetic difference making its to depend on species involved in the cross. Examples is found in amphibians frogs and toads. Breakdown of sexual isolation lead to hybrid sterility, hybrid invaibility or poor gene flow.
<span>Group A - chromosome pairs 1 through 3Group B - chromosome pairs 4 and 5Group C - chromosome pairs 6 through 12Group D - chromosome pairs 13 through 15Group E - chromosome pairs 16 through 18Group F - chromosome pairs 19 and 20<span>Group G - chromosome pairs 21 and 22</span></span>
<h3><u>Answer;</u></h3>
The polysaccharide is <u><em>Hyaluronic acid</em></u>
<h3><u>Explanation;</u></h3>
- <u><em>Hyaluronic acid is a natural polysaccharide</em></u> which is in the class of glycosaminoglycans that is mostly found in <em><u>neural, connective and epithelial tissues in human body. </u></em>
- <em><u>Hyaluronic acid is made up repeating units of glucuronic acid and N-acetylglucosamine</u></em> that are<em><u> joined by alternating β- 1,4 and β- 1,3 glycosidic bonds. </u></em>
- It is a <em><u>linear polysaccharide and is the only glycosaminoglycan </u></em>that lacks sulfate atoms in its structure.
Description of the nervous system
Neurons send signals to other cells through thin fibers called axons, which cause chemicals known as neurotransmitters to be released at junctions called synapses
