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Chromosomes are thread-like structures that are found in the nucleus of the cell. They contain many genes which are sections of DNA that code for a particular protein. These proteins will give an individu...

Shoots grow upwards towards light and away from gravity, while roots grow downwards towards moisture and with gravity. Plants produce an uneven distribution the hormone auxin causing unequal growth rates ...

In the light-dependent reactions, a photon of light hits an electron located in the thylakoid membrane of the chloroplast in photosystem II. This causes the electron to gain energy and jump to a higher en...

Lamarck's theory suggests that changes that are obtained during a lifetime can be passed on to the offspring of that creature. The changes typically favour survival for the animal. For example, if a giraf...

environmental factors such as gravity and light enable plants to grow in the correct direction, in the case of shoots, they exhibit positive phototropism, growing towards a light source, and in the case o...