Plants & Protists

Bellringer Cancelled on Short Week

Agenda

Collect Homework– Cell Metaphor Assignment

Notes: Plants & Protists– Specialized Plant Organelles– Protists: Jack of All Trades

Plant Specific Organelles

Plants cells have all of the organelles that Animal cells do.

They also have a few organelles that animals do not have.– Cell Wall– Chloroplasts– Central Water Vacuole

Cell Wall The cell wall surrounds the

membrane of plant cells. It is made of a tough,

fibrous material called cellulose.

It provides support and protection for the cell.

Chloroplasts Chloroplasts are the organelles where

photosynthesis occurs. Photosynthesis is when light energy is

captured and used to combine water and carbon dioxide into glucose (sugar).

Central Water Vacuole The central water vacuole is a large

vacuole in plants that stores water. It also keeps turgor pressure, which is

the pressure exerted on the cell wall that helps a plant remain upright.

BrainPOP: Cell Types

Protists Protists are very diverse lifeforms.

They are eukaryotic organisms that may

be unicellular or multicellular and may be consumers or producers.

There are 3 categories of protists– Animal-Like– Plant-Like– Fungus-Like

Protozoans (Animal-Like)

Unicellular, so similar to bacteria Eukaryotic, so similar to plants & animals Protozoans move by use of flagella, cilia,

or pseudopods.

Pseudopod Movement

Pseudopods are also called ‘false feet’

Cell membrane pushes in one direction & the cytoplasm flows into the bulge. The protozoan moves by dragging the rest of the cell behind it.

Pseudopods can also be used to surround and trap food

Pseudopod Feeding

Ameoba Movement Video

Algae (Plant-Like) Some algae are multicellular, so they are

similar to plants (kelp/seaweed) Euglena are unicellular algae that perform

photosynthesis, but will act like consumers when there is no sunlight

Euglenoid Video

Slime Molds (Fungus-Like) These “blobs” are decomposers who

move to feed on dead material Like plants these have cell walls, but

the wall is not made of cellulose

Slime Mold Video

Summary Plants Cells Contain:

– Chloroplasts– Cell Wall– Central Water Vacuole

Protists– Animal-Like (Protozoans)– Plant-Like (Algae)– Fungus-Like (Slime Molds)