The correct answer is:
D
.Villi in the small intestine have thin-walled capillaries to make the absorption of nutrients more efficient.
Explanation:
The small intestines are well adjusted for absorbing nutrients during digestion by being very long, having villi and microvilli that enlarge surface area, using muscular contractions to move and mix food, and raising and housing digestive enzymes and bile that aid the breakdown of food. The inner surface of the small intestine is not flat but thrown into circular folds, which not only enhance surface area but aid in preparing the ingesta by acting as baffles. Villi: the mucosa makes multitudes of ridges which project into the lumen and are satisfied with epithelial cells.
carbon, the fundamental component for all the macromolecules.
Answer:
A peptide bond is a chemical bond formed between two molecules when the carboxyl group of one molecule reacts with the amino group of the other molecule, releasing a molecule of water (H2O).
Explanation:
This is a dehydration synthesis reaction (also known as a condensation reaction), and usually occurs between amino acids.
The answer is <span>C. Change in odor.
There are several signs of chemical reaction:
1. Dissolved precipitate.
2. Formation of gas (bubbles).
3. Change of color.
4. Change of temperature (warming or cooling).
5. Production of energy.
Among these signs, there is no change in odor, which is, thus, the right choice.</span>
