This is true, a covalent bond is always a shared pair of electrons between 2 atoms. This is done to stabilize both atoms but making their outer energy level more or totally complete with electrons.
Answer:
The higher the recruitment, the stronger the muscle contraction will be. The greater the cross-sectional area of the muscle, the more muscle fibers that can be activated simultaneously.
Muscle strength is directly dependent upon the size of the cross-sectional area of muscle.
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Explanation:
The correct answer is: C) the extraction of energy from high-energy electrons remaining from glycolysis and the citric acid cycle
Electrons from electron carriers (NADH and FADH from glycolysis and citric acid cycle) donate electrons to the electron transport chain and that causes changes in protein complexes of electron transport chain. As a consequence, protein complexes pump H+ across a selectively permeable cell membrane from the mitochondrial matrix into the intermembrane space of mitochondria. H+ can only get back and pass through the inner mitochondrial membrane with the help of ATP synthase (down their electrochemical gradient). ATP synthase turned by the force of the H+ diffusing through it forms ATP by adding a phosphate to ADP. This type of ATP synthesis is called oxidative phosphorylation and it is based on chemiosmosis-movement of ions across a selectively permeable membrane.
Hello. Giraffes with longer necks survive compared to those with shorter necks because of natural selection. Over time, natural selection favors the traits that would make a species thrive better in the environment. Giraffes with short necks won't have access to that much food compared to those with long necks thus they eventually died out.
ANSWER: natural selection.
