"Main Groups of Protists" PPT

Description

"Main Groups of Protists" PPT

Part One: Main Characteristics of Protozoa

single cell or multicellular

Simple structure

Has a nucleus

think

Compare the structural diagrams of Paramecium and Chlamydomonas. What are the structural differences between them? How to obtain the organic matter they need?

Main characteristics of protozoa

Single cells, capable of ingesting food and completing all physiological functions. Most live in water and a few are parasitic.

Main groups of protists PPT, Part 2: Classification of algae

Green algae such as: Chlamydomonas, Chlorella, Spirogyra, Ulva

brown algae

Kelp: Commonly known as kelp, it is multi-cellular and has tough petioles and anchors. It can grow on the seabed. The plant body is leaf-shaped or flat ribbon-shaped, and some can be tens of meters long.

Sargassum: It is one of the common seaweeds on shallow sea reefs. There are air bags to help with flotation.

The main characteristics of algae

Single-celled or multi-celled, they all contain chlorophyll and carotenoids and can perform photosynthesis. Most of them live in water. Some algae also contain phycoxanthin, phycoerythrin or phycocyanin.

The role of algae in the biosphere and their relationship to humans

Regarding the role of algae in the biosphere and its relationship with humans, the picture on the right can give you some hints, but it is not necessarily comprehensive. Is there anything else you can add?

Dangers of red tide:

①Cause abnormal changes in the ocean, partially interrupt the marine food chain, and turn the sea area into a dead sea for a time;

② Some red tide organisms secrete toxins, and these toxins are ingested by certain organisms in the food chain. If humans eat these organisms, they will cause poisoning or even death.

Keywords: Beijing Normal University Edition Biology PPT courseware for eighth grade volume 2 free download, PPT download of the main groups of protists, .PPT format;

For more information about the PPT courseware "Diversity of Species and Main Groups of Protists", please click the Diversity of Species PPT and Main Groups of Protists PPT tab.

"Main Groups of Protists" PPT courseware:

"Main Groups of Protists" PPT Courseware Part One Content: Learning Objectives 1. State the main characteristics of protists and the groups they include 2. State the main characteristics of protists and their relationship with humans 3. Summarize the main characteristics of algae and relationships with humans... ..

File Info

Update Time: 2024-11-21

This template belongs to biology courseware Beijing Normal University Edition Eighth Grade Biology Volume 2 industry PPT template

Preview