What is the difference between lipid hormones and protein hormones? a. Protein hormones diffuse directly through the target cell and begin a signal transduction pathway with a series of chemical
messengers or enzymatic reactions of the target cell.
b. Lipid hormones diffuse directly through the target cell and begin a signal transduction pathway with a series of chemical
messengers or enzymatic reactions of the target cell.
c. Lipid hormones bind to a receptor to enter the target cell and begin a signal transduction pathway with a series of chemical
messengers or enzymatic reactions of the target cell.
d. Protein hormones bind to a receptor to enter the target cell and begin a signal transduction pathway with a series of chemical
messengers or enzymatic reactions of the target cell.

the sun creates it's own light, also gives light and life to bunch of stuff like plants,animals,humans etc.photosyntesis is the process of making food which needs sun,water,nutrients etc.

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.