Question

Humans have used plants since we were humans. It was recently discovered that Neanderthals used inner bark to make twine 50,000 years ago. The Agriculture Revolution began 10,000 years ago. Even if that date is conservative (i.e. modification of plants began much earlier), that's a long enough time for plants and humans to co-evolve. How have humans influenced the evolution of Angiosperms? Think of all the structures and products of Angiosperms that we use. What have we humans selected for?

Answer 1

Charles darwin considered the relatively rapid evolution of the flowering plants an "abominable mystery."As you have seen , a flower is complex .it could be considered an organ system , analogous to the organ systems in your body.The four concentric rings of organs which make up a flower are;

* Beginning in the center is the "woman's house" or pistil.

* surrounding the pistil is the " man's house" - a ring of stamens.

* outside the stamens is the corolla- a whorl of petals.

* outermost is the calyx- a whorl of sepals.

The evolution of flowers probably involved the change from a spiral of modified leaves ,to several whorls of reproductive organs.in cross section, a flower has four concentric rings of organs : innermost female carpels,surrounded by a ring of male stamens ,surrounded by sterile petals and finally, sepals .

2) As a result, angiosperms are the most important ultimate source of food for birds and mammals,including humans.in addition, the flowering plants are the most economically important group of green plants,serving as a source of pharmaceuticals,fibre products,timber,ornamentals, and other commercial products.people eat vegetables,fruits and cereals, which are made of angiosperms.sometimes clothes are made from angiosperms , such as cotton.furniture is often made from the wood of maple,cherry and oak trees,medications can also be made from angiosperms.