The retina at the back of the eye contains

Rods and Cones

Explanation:

The retina contains photoreceptors that absorb light and then transmits those signals through the optic nerve to the brain. Those photoreceptors are called rods and cones. That's how we can see and interpret colors.

they fuse to form they have half as many chromosomes as a somatic cell of the same individual. b

before, trains worked using the steam engine. thus, it uses heat so it is crucial to apply heat balance. the steam engine absorbs energy during the stage of boiling water. so, this is the endothermic reaction. when the steam is used to work the piston, it has to release this energy through running the train. the excess energy is released as an exhaust to the chimney. this is the exothermic process because it releases energy to the surroundings.