The answer for this question should be c because an ecosystem is. Agrassland
<h3><u>Question</u><u>:</u><u>-</u></h3>
Which of the following are reactants of cellular respiration?
glucose, water, carbon dioxide
water and glucose
carbon dioxide and glucose
oxygen and glucose
<h3><u>Answer</u><u>:</u><u>-</u></h3>
glucose, water, carbon dioxide
<h3><u>Explanation:</u><u>-</u></h3>
Cellular or aerobic respiration is a series of chemical reactions that begin with a sugar reactant in the presence of oxygen and produce carbon dioxide and water as waste.
Answer:
D. Calcium ions.
Explanation:
Here we are talking about the mechanism of muscle contraction. The most accepted theory of muscle contraction is sliding filament theory. It was given by Huxley and Huxley. During the process actin filaments slides over myosin filament by forming cross bridges. The sequence of events are as follows:
a. An action potential propagates through the motor nerve and reach the nerve endings on the muscle fiber at neuro-muscular junction.
b. Neurotransmitter called acetylcholine is released by the nerve endings.
c. Acetylcholine binds to the receptors on muscle fiber and opens the gated channels which causes flow of Na+ ions into the muscle fiber.
d. This influx of sodium ions initiates an action potential in the muscle fiber which reaches the T- tubules or transverse tubules. Here it causes the sarcoplasmic reticulum to release large amounts of calcium ion.
e. Calcium ions are responsible for initiating the attractive forces between actin and myosin filaments. Cross bridges are formed, actin slides over myosin causing the contraction of muscle.
D. Fingerprinting involves binding radioactive probes to label DNA that has been digested by an endonuclease and separated out
