When muscle proteins are catabolized in skeletal muscle during a fast, what are the fates of the glucogenic amino acids and other amino acids? Glucogenic amino acids are converted to glucose in the muscle cells. Other amino acids are oxidized in mitochondria via the citric acid cycle. Glucogenic amino acids are converted to glucose in the liver. Other amino acids are oxidized in mitochondria via the citric acid cycle. Glucogenic amino acids are converted to glucose. Other amino acids are excreted in the urine. Glucogenic amino acids are stored in the brain. Other amino acids are stored in the liver. Glucogenic amino acids are sent to the brain to be converted to glucose. Other amino acids are oxidized in mitochondria via the citric acid cycle.

the reason the two sea urchins don't compete with each other for food, resources, etc. is because the urchins have adapted to the environment but they have also adapted to each other. this is most likely because the genes of the sea urchins.

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.