<u>Answer</u>: B. complex, folded chains of amino acid
Proteins are a class of large organic compounds composed of amino acids in the form of one or more long chains. The amino acid sequence determines the protein's shape and is in turn dictated by the DNA sequence that codes it. Proteins are vital for all the body's functions.
Answer:
(look at explanation)
Explanation:
Cardiac muscle tissue works to keep your heart pumping through involuntary movements. This is one feature that differentiates it from skeletal muscle tissue, which you can control. It does this through specialized cells called pacemaker cells. These control the contractions of your heart.
F
<span>
The youthful stage of the river is when water flow is the quickest. Waterfalls, potholes, V-shaped valleys and interlocking spurs are features of the youthful stage, and these features are due to erosion. The flow becomes gentler during the mature stage, and the river widens. Curves are characteristic of the middle stage as well. On the inside of the curves, deposition will take place. On the outside, erosion will take place. Land is the flattest during the old age stage. The river has to work hard to make its way to the sea.</span>
Plants add water to the atmosphere through transpiration. Transpiration is the process of water moving through plants and evaporating, becoming water vapor. This water vapor is released into the atmosphere.
