Traditionally the unit was the kilo-calorie but commonly just referred to as calorie. today's SI unit is the Joule...
Just like plants on land, ocean-going plankton need light from the sun to prosper and grow. But light is absorbed by ocean water, and some colors of light are absorbed more readily than others.That's why nearly all photosynthesis in the ocean takes place in the sunlit upper layers.
Answer:
Point B
lighted candle is placed in front of a plane mirror. ... The candle, which appears behind the mirror, is the image of the candle formed by the mirror. The candle itself is the object. And the image will form at the equidistant in the mirror.
The root contains hormones that make it grow away from the sun
