Answer:
The classification of organisms as either a prokaryote or a eukaryote is based on the structure of the organism's cell nucleus
Explanation:
The etymology of the word 'karyote' in both 'prokaryote' and 'eukaryote', is derived from a Greek word that explains the nucleus.
An organism having a true nucleus (i.e a nucleus surrounded by a nuclear membrane) in its cell(s), is classified as a eukaryote.
'Eu' in the word 'eukaryote', is derived from a Greek word that means 'true'.
A prokaryote is an organism that lacks a definite nucleus, hence, having its genetic materials suspended freely in the cyoplasm without a special nuclear membrane enclosing it, aside from its plasma membrane.
Answer:
B. Shortens
Explanation:
Myofibrils are components of the animal skeletal muscles that are made up of sacromeres. They perform the muscular contraction and relaxation via the sliding filament model.
To produce motion, A cross-bridge forms between actin and the myosin heads triggering shortening of the sacromere. This shortening of the sacromere results in the contraction of the muscle fibers, which the net effect can be seen to be a shortening of the fibers
Answer:

Explanation:
This is Xylose-glucose which is an Organic sugar - first isolated from <em>wood</em> ( xylose in greek, which it is named after ), and is a monosaccharide free within the aldehyde group. This is a reducing sugar.
You may know that oxygen, carbon, and hydrogen and base organic elements found in pretty much all organic substances.
Oxyhemoglobin. Oxyhemoglobin is formed during physiological respiration when oxygen binds to the heme component of the protein hemoglobin in red blood cells. This process occurs in the pulmonary capillaries adjacent to the alveoli of the lungs.