Ans c, decreases from bottom to top
The process of natural selection is described in the cartoon.
Explanation:
Natural selection is the mechanism by which an organism survive and evolve.
It is the process in which organism have better adaptation to its environment and live to reproduce organisms with useful traits which are passed on to their offsprings.
In the given cartoon it is observed that green beatles fall prey to the crows as a result their survival chances are minimal. Over the generations they are eaten by crows and eventually their brown counterparts are in majority. This is because the brown colour beatles are safe from the prey, they pass on this trait to their offspring and remains safe and more in population.
The brown colouration in beatles is the Darwinian trait of survival of the fittest for beatles.
The variation in population, mutation or genetic drift causes natural selection.
The one with better adaptation survives and reproduce more viable offspring in the population.
Answer: A. Rangeland → Pastureland
Rangeland can be defined as biome, which is dominated by the growth of shrubs and grasses. These are found in grassland, woodlands , wetlands, shrublands and deserts. A rangeland can be used as pasture land. A pasture land can be any land used for grazing by wild and domestic herbivorous animals. The rangeland can be appropriately used as pasture land because it provides a substratum for the growth of large diversity of grasses, hence, can be used as land for grazing domestic animals like cattle sheep, cow and buffalo. Therefore, reduces the expense of commercially available fodder.
The correct answer is cancer. Cancer is the consequence that scientists are concerned that is could possibly result from the use of genetically engineered growth hormones in dairy products. Cancer involves abnormal cell growth that is potentially be spreading in the body.
