The answer is D. Zygote. A zygote is formed by the fertilization of an egg by a sperm. A gamete is what we refer to an egg or sperm as. Fertilization is what we call when a sperm and an egg come together, but it is not the product of the two.
During photosynthesis, light energy, combined with water and CO2 gas, make a sugar called glucose.
Glucose has to go through another process called cellular respiration in order for the glucose to be changed into usable energy that would be useful for the plant.
Pray this helps you. :)
The statement water is easily polluted..... is true. Water is pretty much the world's best solvent. So even toxic substances are easily dissolved in it and when that happens they pollute the water.