Plant Cells: Powering Life with Light

Plant Cells: Powering Life with Light

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What do you think plants have that animals don't?

Today, we will look at what makes plant cells special!

Unique Features of Plant Cells

• Plants have 3 additional structures:
• Cell wall
• Large central vacuole
• Plastids (including chloroplasts)

The Cell Wall- Strength & Support

• Rigid layer outside plasma membrane
• Made of cellulose (a carbohydrate)
• Provides support, shape, and protection

The Central Vacuole - The Water Tank

• Large, fluid-filled organelle storing water, enzymes, wastes & nutrients
• Can tale up to 90% of cell volume
• Water pressure (turgor) keeps plants upright

Turgor: pressure exerted by the fluid inside a plant cell against the cell wall.

Vacuoles in Action

How does the turgid cell image, help plants survive dry periods?

Plastids: The Specialized Organelles

• Double membrane & have own DNA
• Types, Chloroplasts

Chloroplasts- Where Light Becomes Food

• Use sunlight to make carbohydrates from carbon dioxide + water
• Thylakoids contain chlorophyll (absorbs light)
• Chlorophyll: green pigment found in chloroplasts

Not Just in Plants!

• Chloroplasts are found in both plants and some algae.

Prokaryotes v. Eukaryotes

Feature/Prokaryote/Eukaryote Nucleus/Yes/No Organelles/No/Yes Examples/Bacteria/Animals, Plants, & Fungi

Plant vs. Animal Cells

• Plants: cell wall, large vacuole, & chloroplasts
• Animals: centrioles, lysosomes, & flexible shape

What All Cells Share

• All cells have:
• Cell membrane
• Cytoplasm
• Ribosomes
• Genetic material (DNA/RNA)

Game: Who Am I?

Big Takeaways from Today

• Plant cells have cell walls, vacuoles, & chloroplasts
• These help them stay upright, store water, & male food.
• Prokaryotes lack nuclei & organelles.
• Plant & animal cells share structures but differn in adaptations.

Let's Review: https://openoregon.pressbooks.pub/mhccmajorsbio/chapter/summary-table-of-prokaryotic-and-eukaryotic-cells-and-functions/

Exit Ticket

• Describe one feature that distinguishes prokaryotes from eukaryotes.
• Describe one feature that distinguishes plant cells from animal cells.

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Visual communication is a key tool. We find it easier to ‘read’ images than to read a written text. Disciplines such as Visual Thinking facilitate the organization of knowledge through the use of images, graphs, infographics, and simple diagrams.

Sunflower

Linen

Poppy

Carnation

season

Winter

Spring

Summer

Autumn

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Pose a question or problem that makes the class think; it is the essential ingredient to maintain their attention. It is usually posed at the beginning of the topic to encourage critical thinking and participation.

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Although you should not abuse bulletpoints, icons and schemes can be great allies when presenting. You will keep your class's attention and the information will be engraved in their brain.

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Although you should not abuse bullet points, icons and schemes can be great allies when presenting. You will keep your class's attention and the information will be engraved in their brains.

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Social beings

Narrative beings

We are visual beings

We need to interact with each other. We learn collaboratively.

We tell thousands and thousands of stories. ⅔ of our conversations are stories.

We are able to understand images from millions of years ago, even from other cultures.