An ecologist studying plants in the desert performed the following experiment. She staked out two identical plots, each of which included numerous small wildflowers. She found the same five wildflower species in roughly equal numbers in both plots. She then enclosed one of the plots with a fence to keep out major herbivores. After two years, four of the wildflower species were no long present in the fenced plot, but one species had increased drastically. The control plot had no change in species diversity.

the denominator has a very specific role.

answer: b: experiments that showed that all cells are similar in how they metabolize and in their composition

explanation:

correct answer: understand the different control methods available

integrated pest management is an strategy that is based on the ecosystem and try to prevent the pest and the damage caused by them by applying combination of technique like habitat manipulation, biological control and use of resistant varieties.

the main aim of the integrated pest management is not to completely eliminate the pest but to strengthen the ecosystem so that conditions are favorable for plants and unfavorable for pests.

the oldest known insects are believed to live around 400 millions ago as suggested by the fossil records.   some plants having woody stems also evolved during this time.

after the evolution of insects the first four legged species or the tetrapods evolved in shallow freshwater habitats from the intermediate species approximately 397 million years ago. the tetrapods went on conquering the land giving rise to amphibians, reptiles, mammals and birds.

the major split in tetrapods first occurred 340 million years ago branching off from amphibians.

363 million years ago when the carboniferous period began the insects started roaming on land and taking flights, following which the four limbed tetrapods adapted in the terrestrial habitat.