Different types of changes take place in ecosystems after they experience a disturbance. from june to september 1988, 51
different wildfires started in yellowstone park. by the end of the summer, approximately 794,000 acres of the park were
affected, including about 24 percent of the whitebark pine forest population, many lodgepole pine stands, and a variety of other
plants and animals.
photo by national park service
which type of change was seen in the ecosystems affected by the 1988 fires in yellowstone park?
primary succession

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.

the answer to the blank provided is “an autosomal gene that is required for the expression of genes on the x chromosome”.

testis-determining factor, abbreviated as td, which is more popularly known as sex-determining region y or sry protein, is a dna-binding protein or  gene-regulatory protein/transcription factor, encoded by the  sry gene. it is the gene responsible for the initiation of male gender determination in humans.

friedrich meischer discovered it in white blood cell