Question

1-Compare the hibiscus and spider lilly pollen grain strucuture
2. Why stigma at the top of pistil is often sticky?
3. Why pollen is important in fertilization?

Answer 1

Answer:

1.The hibiscus and spider lily both have circular pollen grain. However, the atomic structure of pollen grain of hibiscus represents the Buckminster fullerene but is not shown in spider lily. The pollen grains of hibiscus have spikes on its surface.

2. The top part of the pistil is called the stigma and is sticky so it will trap and hold pollen.

3. Pollen does more than make you sneeze. In fact, the job of each individual pollen grain is to protect and transport male plant DNA, or genetic material, to the female part of a flower, called the stigma. Pollen evolved to allow fertilization to take place between plants that were not close to each other.