Organisms and P...

Which best illustrates the competitive exclusion principle?

The story of the Mexican cave fish, Astyanax mexicanus, an intriguing example of how environmental stressors play a role in the development, adaptability, and diversification of an organism. Shown in the image is the mexicanus species, noticeably different from its surface counterpart in that it does not have developed eyes and lacks pigmentation.
Recent findings support the idea that the cave species arose when surface fish were trapped in cave waters, raising the levels of stress in the animals. As the thinking goes, triggering stress pathways destabilize a network of proteins that normally works to stabilize phenotype, leading to altered gene expression. Such conditions will lead to increased phenotypic variation, including the development of eyes in subsequent generations.
Which of the following choices is a feasible explanation for the selective advantage of individuals with diminished or no sight?

The carrying capacity of an environment in the given population growth curve is represented by

What is true about the relationship between hare and lynx if lynxes depend mainly on hares for food?

Which of the following describes a random event?

Insects constitute the largest animal group on earth. About 25-30% of the insect species ate known to be herbivores. In spite of such huge herbivore pressure, globally, green plants have persistence. One possible reason for this persistence is:

Mac Arthurs vision of five closely related species of warbles living on same tree were able to avoid competition and co-exist by behavioural difference. This is an example for

The number of children born to an average woman in a population during her entire reproductive life is called as

What do you means by potential natility?

Connel's field experiment on the rocky sea coast of Scotland, where larger Barnacle balanus dominates the intertidal area and removes the smaller Barnacle cathamalus. This happened due to.