Answer:
by measuring and examining a random sample of the population being analyzed.
Explanation:
Discontinuous variable ;)
The structure of a typical antibody molecule
Antibodies are the secreted form of the B-cell receptor. An antibody is identical to the B-cell receptor of the cell that secretes it except for a small portion of the C-terminus of the heavy-chain constant region. In the case of the B-cell receptor the C-terminus is a hydrophobic membrane-anchoring sequence, and in the case of antibody it is a hydrophilic sequence that allows secretion. Since they are soluble, and secreted in large quantities, antibodies are easily obtainable and easily studied. For this reason, most of what we know about the B-cell receptor comes from the study of antibodies.
Antibody molecules are roughly Y-shaped molecules consisting of three equal-sized portions, loosely connected by a flexible tether. Three schematic representations of antibody structure, which has been determined by X-ray crystallography, are shown in Fig. 3.1. The aim of this part of the chapter is to explain how this structure is formed and how it allows antibody molecules to carry out their dual tasks—binding on the one hand to a wide variety of antigens, and on the other hand to a limited number of effector molecules and cells. As we will see, each of these tasks is carried out by separable parts of the molecule. The two arms of the Y end in regions that vary between different antibody molecules, the V regions. These are involved in antigen binding, whereas the stem of the Y, or the C region, is far less variable and is the part that interacts with effector cells and molecules.
The correct answer is - B. The number and type of plants in an ecosystem determines the number and type of consumers that can live there.
The plants are producers. They are the basis of the ecosystems on Earth. By consuming the plants, the consumers are able to survive and thrive, thus the food chain develops further up to the predators that are consuming other consumers.
The number of plants and the type of plants determines what type and how many species of consumers can live somewhere. The more plants there are, the more food for the consumers, thus there will be more consumers. The higher the diversification of the plants, the higher the diversification of the consumers will be too, as every plant is unique and specialization for consuming it is needed, thus the consumers will evolve into new species in accordance to the food source.
