Angiosperms

How does seed production in the flowering plants differ from that of the conifers (i.e., Pine trees)?

How does seed production in the flowering plants differ from that of the conifers (i.e., Pine trees)?

In flowering plant seeds are enclosed within ovary. Flowering plants have seeds inside flowers, while conifers have seeds in cones, embryo development takes place within seeds.

Sepals

Protect flower bud before it blooms

Petals

Attract pollinators for reproduction

Anther

Produces pollen, sperm for fertilization

Filament

Supports anther; so pollen can be dispersed

Stigma

Female reproductive organ, receives pollen during fertilization

Style

Connects stigma to ovary, helping pollen reach ovules for fertilization

Ovary

Ovules (future seeds) develop after fertilization

What is the definition of a flower?

Specialized shoot with modified leaves containing female and make reproductive organs

Is your flower monocot or dicot?

Monocot

How did you determine that?

1 Seedlings

Is your flower complete or incomplete?

Complete

What are the 4 structures that define a complete flower?

stamen, carpel, petal, and sepal

What is the embryo sac called?

Female Gametophyte

Locate the ovary. Define the ovary as well as the main function.

Ovary is the pistil in a flower the main function is to enclose and protect the ovules

Once 2 sperms are released into an embryo sac, what is the next step?

Double Fertilization, one sperm fertilizes egg and other combines with polar nuclei

Write 2 equations of double fertilization

egg cell (1n) + sperm cell (1n)= Zygote (2n)

Central cell (2n) +sperm cell (2n) = Endosperm nucleus (3n)

is a corn kernel a seed or a fruit?

seed

Which structure becomes the embryonic shoot once germinated?

plumule

What is the main function of coleoptile and coleorhiza?

Coleoptile- Protect emerging shoot (plumule) upward

Coleorhiza- Protect radicle downward

The endosperm of a corn is made of what?

Starch, proteins, and other nutrients

What is pericarp?

Fruits protective outer layer; surrounds seeds

Define a seed

A flowering plants unit of reproduction

How would you distinguish between monocots and dicots based on the two different pictures?

Leaf ruination, flower parts, root system, seed structure

Which seed has the best developed embryo between the two?

Angiosperm

What correlation is there between the amount of endosperm and the development of the embryo?

The more endosperm a seed has, the better it can support the embryo’s growth

Define a fruit and its functions

A mature ovary of a flowering plant, contains seeds function, seed dispersal, protection, nutrition, attraction

True or false) Tomato and cucumber are fruits. Write your reasons about your answer.

True; They have seeds

Why are angiosperms more evolved than gymnosperms?

Have flowers and fruits, which attract pollinators and disperse seeds. Double fertilization, optimizes resource use for embryo development.