what is geotropism?????
Answers
Gravitropism is a coordinated process of differential growth by a plant or fungus in response to gravity pulling on it. Gravity can be either "artificial gravity" or natural gravity. It is a general feature of all higher and many lower plants as well as other organisms
Answer:
Gravitropism (also known as geotropism) is a coordinated process of differential growth by a plant or fungus in response to gravity pulling on it. Gravity can be either "artificial gravity" or natural gravity. It is a general feature of all higher and many lower plants as well as other organisms. Charles Darwin was one of the first to scientifically document that roots show positive gravitropism and stems show negative gravitropism.[1] That is, roots grow in the direction of gravitational pull (i.e., downward) and stems grow in the opposite direction (i.e., upwards). This behavior can be easily demonstrated with any potted plant. When laid onto its side, the growing parts of the stem begin to display negative gravitropism, growing (biologists say, turning; see tropism) upwards. Herbaceous (non-woody) stems are capable of a small degree of actual bending, but most of the redirected movement occurs as a consequence of root or stem growth outside. The mechanism is based on the Cholodny–Went model which was proposed in 1927, and has since been modified.[2] Although the model has been criticized and continues to be refined, it has largely stood the test of time.[3]
This is an image taken of a tree from Central Minnesota. The tree was on the face of a hill and had blown over in a previous storm or fell over due to erosion in the soil surrounding it. The tree continue to grow however, and because it was horizontal, it's growth exhibited the phenomenon known as gravitropism which can be seen in its arched growth.
Example of gravitropism found in a tree from Central Minnesota. This tree has fallen over and due to the phenomenon known as gravitropism, the tree grew and exhibited this arched growth.
A straight and vertical tree. The shape has been regulated by the gravitropic curvature at the base.
Explanation:
make my answer in the brain list thanks also