This tutorial digs into the past to investigate the origins of life. The section is split into geological periods in the..
Plants, like animals, produce hormones to regulate plant activities, including growth. They need these hormones to respo..
Hormones are chemical messengers produced by specialized glands and they were produced by switching on the genes designe..
A balanced diet is essential to a healthy organism. Insufficiency or too much of a particular element or compound, such ..
Plant cells have plastids essential in photosynthesis. They also have an additional layer called cell wall on their cell..
The diversification of several new species from a recent ancestral source, each adapted to utilize or occupy a vacant ad..