Exam 45: Plant Reproduction and Development

Briefly describe how a seed develops from the ovule.

Endosperm has allowed the angiosperms to become the most numerous and diverse plant group. What is the role of the endosperm?

Commercials on TV use food and sex as their most effective selling points. Explain how flowers use the same two points to "sell" their pollen to animals.

A fruit is a mature

The first leaves produced by an embryo while still inside the seed are

The sexual life cycle of plants is described as alternation of generations because it alternates between

The sporophyte produces

In the ovule, which two cells (with a total of three nuclei) are fertilized?

What are the advantages of producing gametes within a flower?

All of these flower structures are modified leaves EXCEPT

When a seed germinates, what usually emerges from the seed coat first? Why?

In flowering plants, the sperm does not have to swim to the egg. The sperm reaches the eggs by

During a late- summer walk through a park, you notice a tree that has remnants of many flowers but no fruits or seeds developing. There are no other trees like this one in the area. What could explain this occurrence?

What is the function of the stigma of a flower?

Based on the figure, the must have contained two nuclei before fertilization.

What are the results of double fertilization?

Cotyledons and endosperm both provide nutrition. What is the difference between them?

In temperate deciduous forests, most of the small flowers that grow on the forest floor must complete their life cycle quickly before tree leaves shade out most of the light. Many of these plants reproduce asexually by runners. What advantages does this have for such plants?

While walking along a riverbank after a swim, you step on a sharp fruit. When you pick it up, you notice that it rattles, which indicates there is an air pocket around the seeds. How is this fruit most likely dispersed?

Describe the process of alternation of generations in plants.