Answer:
A-2
B-4
C-1
D-3
Explanation:
In description A, the car is first moving at a constant speed, which means it will have a constant slope. Then, it stops, which causes a slope of 0. Finally, it moves in the opposite direction, which will cause a negative slope. The second graph has a positive, zero, and negative slope; therefore, it fits A.
Description B has a constant slope, a zero slope, and a higher slope. Graph 4 goes up normally, then stops, and finally goes steeper. This fits description B.
Description C has a constant and then a higher slope. Graph 1, increases steadily and then sharply increases; which fits C.
Description D has a constant and then a lower slope. Graph 3 increases fast but then flattens, which matches the slopes in the description.
The muscles that contract (during cold or fright), the slanted hair follicle is pulled upright, dimpling the skin surface with goosebumps are called arrector pili muscle.
The arrector pili muscle are tiny muscle that attaches to the base of the hair follicle at one end and to the dermal tissue on the other end. When the body feels cold or fright the body generate heat and the arrector pili muscle contract all at once, that causes goosebumps on the skin.
The arrector pili muscle acts as the thermoregulator. Straight stand hair increases air trapping, so that the heat loss from the body decreases. The arrector pili muscle are mediated by the sympathetic nervous system.
To learn more about sympathetic nervous system here
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In the conversion of glucose to pyruvate, one step of the actual steps involves electron transfer. The correct option is B.
<h3>What is glycolysis?</h3>
Glycolysis is the method of breaking glucose to produce energy. It generates two pyruvate molecules, ATP, NADH, and water. The process occurs in a cell's cytoplasm and can take place in aerobic or anaerobic organisms.
It can occur even without oxygen. During glycolysis, glucose is broken down into pyruvate and energy, yielding a total of two ATP. One of the actual steps in the conversion of glucose to pyruvate involves electron transfer.
Thus, the correct option is B, it involves one step.
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Your question seems incomplete, the missing options are:
A. none. B. 1. C. 2. D. 3. E. 4.
DNA and RNA perform different functions in humans. DNA is responsible for storing and transferring genetic information while RNA directly codes for amino acids and as acts as a messenger between DNA and ribosomes to make proteins.
