Warmup 10/6/15

What's your favorite kind of seed or plant, and why?

Objective Tonight’s HomeworkBecome familiar with gymnospems and angiosperms

review pp 298: 1, 2, 4

Notes on Gymnosperms and AngiospermsVascular Plants with Seeds

The vast majority of plants fall into this category.

This includes gymnosperms (plants without flowers), and angiosperms (those with flowers and fruit).

Notes on Gymnosperms and AngiospermsConiferophyta

This phylum includes all conifers – all plants that have cones. Not all cones look like the familiar pinecone, though, so don’t take this at face value.

The berries of the juniper bush are technically cones.

Notes on Gymnosperms and AngiospermsWe can spilit coniferophyta into four major families:

Notes on Gymnosperms and AngiospermsWe can spilit coniferophyta into four major families:

Pine Family:These have familiar needles and cones. They keep their needles all year and produce sturdy wood.

Notes on Gymnosperms and AngiospermsWe can spilit coniferophyta into four major families:

Pine Family:These have familiar needles and cones. They keep their needles all year and produce sturdy wood.

Yew Family:These grow slowly, have waxy needles, and have cones that look like red fruit.

Notes on Gymnosperms and AngiospermsCypress Family:This includes the familiarjuniper bushes. All conesin this family are either verysmall, or remain fleshy likethose on junipers. These haveoverlapping scales instead ofneedles.

Notes on Gymnosperms and AngiospermsCypress Family:This includes the familiarjuniper bushes. All conesin this family are either verysmall, or remain fleshy likethose on junipers. These haveoverlapping scales instead ofneedles.

Redwood Family:This family contains the redwood and sequoiatrees. These are some ofthe largest and oldest living things on Earth.

Notes on Gymnosperms and AngiospermsConiferophyta Life-CycleWe start with the pine tree. This is a sporophyte with diploid chromosomes.

Notes on Gymnosperms and AngiospermsConiferophyta Life-CycleThe tree produces 2 types of pinecones, pollen and seed. The pollen ones are typically small.

Notes on Gymnosperms and AngiospermsConiferophyta Life-CyclePollen is made of microspores. These live as the pollen is spread by the wind toward seed cones.

Notes on Gymnosperms and AngiospermsConiferophyta Life-CycleThe pollen enters the seed cone, where it fertilizes the egg and may remain for years.

Notes on Gymnosperms and AngiospermsConiferophyta Life-CycleAs this point, the seed begins life inside the cone, where it gets ready to drop.

Notes on Gymnosperms and AngiospermsConiferophyta Life-CycleWe now have a young zygote, ready to release from the seed cone.

Notes on Gymnosperms and AngiospermsConiferophyta Life-CycleThe process finishes as the seed is released, free to grow on its own.

Notes on Gymnosperms and AngiospermsAnthophyta

Our other major phylum of seed-bearing plants contains all plants that flower or produce fruit.

“Flower” and “fruit” can be misleading terms. The top of a stalk of wheat is technically a flower, and corn is technically “fruit”.

Notes on Gymnosperms and AngiospermsWe have two major classes here to discuss:

Monocots:These plants have seeds that go alone. This can also be seen as the seed sprouts. Monocots usually only have one embryonic leaf.

Notes on Gymnosperms and AngiospermsWe have two major classes here to discuss:

Monocots:These plants have seeds that go alone. This can also be seen as the seed sprouts. Monocots usually only have one embryonic leaf.

Dicots:These plants have seeds that usually travel in pairs. Peanuts are a perfect example of this. Their sprouting seeds usually have two leaves.

Exit Question

What's the difference between a monocot and a dicot?

a) One has fruit the other doesn’tb) One makes flowers, the other doesn’tc) One has 1 seed per pod, the other has 2d) One is edible, the other isn’te) All of the abovef) There is no difference