Can someone me with these two questions ? 1. a carbohydrate molecule is

a)a chain of amino acids that can be used for protein synthesis, protection, and increasing reaction speeds.
b)a macromolecule made of amino acids that provides structure for a cell and is not soluble in water.
c)made up of a chain of monosaccharides that transports genetic coding from one end of the cell to another.
d)made up of the monosaccharide glucose and serves as an energy reserve in plants and animals.

ι вєℓινє тнє αиѕωєя тσ уσυя qυєѕтισи ιѕ в. ℓуѕσѕσмє

ι нσρє тнαт ι ¢συℓ∂ нєℓρ уσυ.

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.