The correct answers are: The lipid bilayer and proteins exist side by side without covalent bonds between them and Some proteins and lipids undergo lateral diffusion along the inner or outer surface of the membrane
According to fluid mosaic model, there is a lipid bilayer that gives fluidity and in which the protein molecules are embedded.
The membrane is mosaic because there is a pattern of different types of molecules that are put together. Molecules are constantly moving in two dimensions.
Components of the cell membrane include:
• Phospholipids – Form a bilayer
• Cholesterol –improves stability and reduce fluidity
• Proteins –integral (transmembrane) or peripheral
• Sugars-usually attached to proteins.
Answer:
During digestion, starches and sugars are broken down both mechanically (e.g. through chewing) and chemically (e.g. by enzymes) into the single units glucose, fructose, and/or galactose, which are absorbed into the blood stream and transported for use as energy throughout the body.
The prairie meadow mice are large eaters, eating their own weight in greens every twenty-four hours. Usually they eat tender stems, leaves, roots, tubers, flowers, seeds, fruits or grasses,The meadow mice helped by cutting down the grass and by loosening the soil with their tunnels.By making tunnels, the mice also continuously mix wastes and their food stores with the soil. In this way the nutrients from the food they eat are quickly returned to the soil.
B
Invasive plant species would end up harming the ecosystem in the long run. this is because it competes, usually unfairly , for space,sunlight and water and minerals.
Invasive species are very interruptive and often contribute to the extinction of endangered species in an ecosystem.
The Correct answer is option A
Reason -
The concept of evolution revolve around the fact that the change in a species occur over a period of time , usually through several generations and through the process of natural selection. It also states that the species are dependent on each other and do change gradually over time.
The above scenarios are not not fulfilled in any of the options other than A. Though in option B, there is a change in characteristics of mice not being trapped in mouse traps but it is something which is taught and not attained through natural selection.
