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Chapter 4: Problem 29

_____ act as the receiving part for pollen grains.

Short Answer

Expert verified
Short Answer: The structure in a flowering plant that acts as the receiving part for pollen grains is the stigma, which is the tip of the female reproductive structure called the pistil. The stigma plays a crucial role in capturing pollen grains and facilitating the process of pollination, leading to fertilization and seed production.

Step by step solution

01

Define pollination

Pollination is the process in which pollen grains from the male reproductive parts (anthers) of a flower are transferred to the female reproductive part (stigma) of the same or another flower. This process is essential for the fertilization of ovules and the formation of seeds.
02

Identify the part of the plant responsible for receiving pollen

The stigma is the part of the plant that acts as the receiving part for pollen grains. It is the tip of the female reproductive structure called the pistil, which consists of the stigma, style, and ovary.
03

Describe the role of the stigma

When pollen grains land on the stigma, they produce a pollen tube that grows down through the style and into the ovary. This enables sperm cells in the pollen to reach the ovules, leading to fertilization and the production of seeds. The stigma is often sticky or has specialized structures to help capture and hold pollen grains.

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