Answer:
The shift from a nomadic lifestyle to settling down on farms led to people producing more food to meet their nutritional needs, and therefore, having more children.
Explanation:
The agricultural revolution is in many ways the most important turning point in the development of the humans. The humans saw the potential in some of the wild crops and that they can cultivate them. In order to do so, the people had to settle and create farmlands, and so they did. For the first time the people started to produce their own food, and not just that they were producing, but it was in such a high amount that they were able to have food for the whole year and more. This resulted in a gradual increase of the human population, as the worry about food was no longer there, the people had shelters and were living in larger groups so they were protected from predators, and they were not risking and losing their lives while hunting larger animals. As the populations were growing, the settlements that had tens or hundreds of people started to grown, and they gave birth to the first towns and cities.
The alimentary canal includes mouth, esophagus, stomach, small intestine, and large intestine. As food passes through the alimentary canal, it is exposed to the different chemical secretions from the organs of the alimentary canal, as well as from other organs, such as liver and pancreas.
First, in the mouth, salivary glands produce saliva which <span>contains enzymes involved in the food digestions. After the food is passed to the esophagus, it produces mucus to help passage of the food. In the stomach, acid and pepsinogen, as well as mucus are produced. All of these secretions help food digestion. Small intestine also produces some digestive enzymes. Further, bile from liver and enzymes from pancreas are secreted via ducts into small intestine. Finally, large intestine secretes mucus for lubrication.</span>
Answer:
It is possibly connective tissue
Explanation:
Alleles are versions of a gene that will express different qualities. Multiple alleles would mean that a gene has many variations; for example, there a multiple alleles for eye color: blue, green, brown, etc. The opposite would be a gene with just two variations; an example would be simple pea plants which can have smooth or wrinkled pods.
Hope this helps!!
