Plants 2a:Plant Parts

PPt. by, Robin D. Seamon

SEEDS

SEEDS:Activities

•Seed tasting LAB: mango, pomegranite, coconut, avocado, kiwi

•Seed Hunt LAB:

•Seed Dissection LAB:

•Seed Planting:

•Seed Experiments:

•Seeds: seeds are made by the plant so that the plant can reproduce itself (make more.)

•Have lots of stored energy in them for the young plant to start life. That’s why animals eat them.

•Germination: the process of a seed sprouting into a young plant.

•To germinate, some need digestion, some need cold, some need warmth, some need fire, all need water.

•Roots grow down geotropism (following gravity)

•Stem grows up phototropism (following light)

•They travel by wind, sticking to animal fur, in water, and by being eaten by animals/people

•We eat some seeds

•There are two types of seeds: Monocots, Dicots

VIDEO: HSW seed dispersal

COTYLEDONS:

1.Monocots have one cotyledon, (corn, rice, wheat, grasses)

2.Dicots have 2 cotyledons (bean plant, roses, cacti)

Seed Parts

1.Seed coat

2.Cotyledons (food)

3.Small plant embryo

Label the type of seed & its 3 parts.

1.Seed coat

2.Cotyledons (food)

3.Small plant embryo

•Gymnosperm seed

•Dicot seed

•Monocot seed

SEED GERMINATION STEPS:

1.Water soaks into the seed coat

2.Seed coat splits

3.Root grows down

4.Small embryo grows up, taking cotyledons with them

5.Cotyledons turn GREEN with sunlight (photosynthesis)

VIDEO: Germination of a Seed 1.5 min

PLANT LABS:1. Leaves: Identify & graph your collection into journal; view & draw fern spores;

Answer questions in Plant Journal.

2. Flowers: identify & draw 5 local spring flowers on white paper. Glue into journal.Roots: identify fibrous & taproots; draw 7 label root parts in journal; Answer questions in Plant Journal.

3. Seeds: seed dissection: label 3 parts of the seed into journal; observe pine nuts in pinecones-- sketch into journal; Answer questions in Plant Journal.

4. Stems: Compare three different types of bark. Notice the color & texture. How do the grains run? Is there a pattern? Create a bark rubbing with a dark crayon (rubbed sideways). Sketch the three specimens.

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LAB: SEEDSRULES: BE CAREFUL DISSECTING THE SEEDS.

• What is the purpose of a seed? ______________________________________

• What is the process of a seed sprouting into a young plant? ________________

• How do seeds travel? _____________________________________________

• What is the difference between a monocot & a dicot? ___________________________________________________________________________________________________________________________________

• Sketch the following parts of your dissected lima bean seeds: (seed coat, cotyledon, small embryo)

• Name 5 seeds that we eat. __________________________________________________________________________________________________

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