Download Wonder of Flowering Plants

The Wonder of Flowering Plants
Name __________________________________________ Pd _____ Date __________
Directions: Read the passage and diagrams to help you answer the questions below.
1. What is sexual reproduction?
Sexual reproduction is the combination of male and female sex cells to produce
offspring
2. Describe the structures and functions of the “stamens”.
Anther – produces pollen
Filament – supports the anther
3. Describe the structures and functions of the “pistils”.
Stigma – sticky end of the pistil that collects pollen
Style – supports the stigma
Ovary – produces the eggs (ovules)
4. What is a perfect flower? What is an imperfect flower?
Perfect Flower – flower that contains both male and female structures
Imperfect Flower – flower that contains either male or female structures
5. Define pollination.
Pollination is the transfer of pollen from an anther to the stigma in the same
flower or in a different flower of the same species
6. What is the difference between self-pollination and cross-pollination?
Self-pollination is when pollen is transferred within the same plant and crosspollination is when pollen is transferred from one plant to another
7. What type of pollination is utilized by a Wisconsin Fast Plant?
A Wisconsin Fast Plant uses cross-pollination
8. What environmental factors move pollen and allow self-pollination to occur? Crosspollination?
Self-pollination relies upon gravity, insects, wind, or rain
Cross-pollination relies upon wind, water, and animals
9. What three structures are located in a pollen grain? How do they differ?
A pollen grain contains two sperm nuclei and one tube nucleus. The tube nucleus
forms a tube that grows down to the ovary and the sperm nuclei move down the
tube to eventually unite with one of the egg nuclei
10. What 8 structures are located in an ovule?
The ovule contains one egg nucleus, two polar nuclei that fuse, and five other
nuclei that eventually disintegrate
11. What is fertilization? What develops when it occurs?
Fertilization is when one sperm nucleus unites with an egg nucleus in the ovule
Once fertilization occurs a seed begins to develop
12. What is endosperm, and how is it formed?
Endosperm is the food source for the developing embryo, it forms when a sperm
nucleus unites with the fused polar nuclei in the center of the egg
13. What is the function of a fruit? When does it develop?
Fruit helps protect the seeds of a plant and serves as a way to disperse them.
The fruit develops after fertilization, once the flower withers the ovary develops
into a fruit.
14. What is the function of a flower?
The flower’s function is to promote pollination, fertilization, and seed production
15. How is a flower like a person?
Both have specialized ways of attracting attention
16. What is unique about a squash?
When a squash is cut lengthwise it retains the original shape of the ovary.