4. Which statement about the aquaculture industry in the US is true? A. Interest in aquaculture has been increasing.

B. Salmon comprise the largest segment of aquaculture in the US.

C. Most commercial salmon farms raise Pacific salmon.

D. Most trout are raised in the South.

six grader is what i am ssorry

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.