Photosynthesis may be defined as the process by which the plants prepare their own food by the use of sunlight and chlorophyll. The light energy is converted into chemical energy for food storage.
The early environment of the Earth's atmosphere is highly reducing. The photosynthesis at an early environment causes the formation of the traces of oxygen. The water molecule will breakdown into the hydrogen and oxygen by the use of the ultraviolet light.
Cells are sometimes referred to as "life's atoms" because there the basic units of life. All cells are surrounded by a structure called the cell membrane — which, serves as a clear boundary between the cell's internal and external environments.
The answer is aneuploidy. This is the result of a malfunction in the process of meiosis that
produces gametes, in the male. The is caused by
a failure in non-disjunction hence an
extra Y chromosome occurs in one of the
formed gamete cells during anaphase II.
