<span>Amylase needs an optimum pH for its activity. It is in the range of 6-7. Below or above pH will denature this enzyme. The pH level is optimum for this enzyme in the mouth and hence it catalyses the break down of sugar. The pH level of stomach is lower than its optimum level duet to the activity of gastric acid. Hence the enzyme becomes inactive in the stomach.</span>
Answer:
I am 99% the answer is A. Darwin did not discover Archaea, Evolution does NOT happen in a straight line, and variation is totally different than evolution.
Explanation:
Answer:C). A phospholipid bilayer with proteins
Explanation: A cell membrane is a phospholipid bilayer with proteins embedded in it. The fatty acyl chains of the phospholipids are non polar and hydrophobic while the phosphate groups are polar and hydrophilic. The hydrophobic regions of the phospholipids interact with each by facing each other, forming a bilayer with a fluid interior. The polar head groups face outward interacting with the external environment of the cell. Proteins are embedded in this bilayer and they float in this sea of phospholipids. Proteins anchored to the membrane through interactions between the hydrophobic regions of the phospholipids and the amino acid side chains of the proteins. These lipids and proteins swim laterally in each face of the bilayer but movement from one face of the bilayer to another is restricted.
Answer:
The answer is D. Food security
Explanation:
Sustainable Agriculture:
Sustainable agriculture or farming is a combination of agricultural policies, practices and measures that yield the maximum profits and benefits without negatively impacting the environment.
Sustainable agriculture, as an idea, basically means to utilizes resources responsibly so that the future generations can reap the benefits as well.
Sustainable Farming Approaches:
Approaches to sustainable farming include policy as well as farming technique interventions. Some of these methods are:
- Crop rotations that involve planting diverse crops on a piece of land, as opposed to monoculture and intensive farming that gradually makes the soil nutrient deficient.
- Cover cropping after a season of monoculture to prevent leaving the soil bare til the next season.
- Use of renewable energy resources and integrated pet management to generate energy efficiently and minimize crop losses respectively.
Food Security:
Food security entails that healthy, nutritious and safe food is readily i.e. physically and economically available for all people. Food security is one of the major sustainability goals.
