Bio unit 5 questions

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What happens in flower fertilization and reproduction?

1. Pollen lands on stigma
- Self Pollination vs. Cross Pollination
2. Pollen germinates to grow a pollen tube
3. Pollen tube moves to ovary
4. Sperm pass through pollen tube to ovary to ferilize egg or ovule
5. Fertilized ovule becomes the seed
6. Ovary becomes swollen

What do perfect flowers posses?

Male and female parts on the same flower.

What do imperfect flowers posses?

Only male or female reproductive parts.

What do complete flowers contain?

Stames, pistils, petals and sepals.

What do seeds contain?

A plant embryo, and food for growth

What are the food sources for seeds?

Cotyledons.

What does a monocot have?

One cotyledon and one seed leaf.

What do dicots have?

Two cotyledons and two seed leafs.

Why have plants evolved seeds?

Because they cannot move from place to place.

How can seeds be dispersed?

By animals, wind, water, and plant mechanics.

What do plants place their seeds in to entice animals?

Place their seeds in fruit.

What are the differences between a monocot and dicot?

1. Number of cotyledons or seed leaves
2. Number of leaves at emergence
3. Leaf Veination
4. Number of floral parts
5. Vascular bundles
6. Root System

Why don't many bird pollinated plants have an odor?

Because birds lack a sense of smell.

What is self pollination

When plants use their own pollen to fertilize themselves.

What are pollenia?

Small rods on flowers that contain pollen.

Describe how the orchid stimulates a female wasp?

They arange their leaves with similar patterns and smells as a female wasp.

How can you identify a monocot plant by examining its flowers?

The flowers have 3 petals and sepals along with 3 or 6 stamens.

How can you identify a dicot plant by examining its flowers?

It's flowers have 4 - 5 petals and sepals along with 4 - 10 stamens.

Describe the four layers that make up the flowers of most species.

Sepals protect the flower, petals attract animal pollinators, a stamen has a stalk that supports an anther which produces gametophytes, and the carpel catches the pollen grains.

What is double fertilization?

The process in which one sperm fertilizes an egg ant ehe other forms a triploid cell.

What structures do a seed and a fruit develop from?

The ovary.

What are the characteristics of bryophytes?

List some examples?

They are nonvascular plants, and don't produce seeds.

Moss.

What are the characteristics of pteridophytes?

List some examples?

They are vascular plants, and produce spores.

Ferns.

What are the characteristics of gymnosperms?

List some examples?

They are vascular plants, produce naked seeds, and the seeds form in a cone.

Conifers.

What are the characteristics of angiosperms?

List some examples?

They are vascular plants, and produce enclosed seeds.

Flowering plants.

Why is it important to understant plant root systems?

They have a pronounced effect on a plant's size and vigor, method of propagation, adaptation to the soil types, and response to cultural practices an irrigation.

Summarize all of the functions of the roots for the plant.

Absorb nutrients and moisture, anchor the plant, support the stem, and store food for the plant can be used for propagation.

What is the function of the meristem?

To manufacture new cells.

What happens to cells in the zone of elongation and how to they accomplish this?

Cells increase in size through food and water absoroption.

What happens to cells in the zone of maturation?

Give examples.

Cells become specific tissues.

Ex: epidermis, cortex, and vascular system.

What do stems support?

Buds and leaves.

What do stems serve as?

Conduits for carrying water, minerals, and food.

List the four phylems of plants?

1. Bryophytes
2. Pteridophytes
3. Gymnosperms
4. Angiosperms

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