Question

notes for biology ch 1 class 11s

Answer 1

Explanation:

botany chapter 1 : biological classification

Two kingdom classification:

It was proposed by Linnaeus, include two Kingdoms-Plantae & Animalia.

In two kingdom classification following things are not considered

Cell structure, nature of wall, mode of nutrition, habitat methods of reproduction and evolutionary relationship.

Five kingdom classification:

It was first proposed by R H.Whittaker (1969).

It includes Monera, Protista, Fungi, Plantae and Animalia

Blue green algae are placed in kingdom Monera.

Chlamydomonas, Chlorella with Paramoecium and Amoeba are placed in kingdom protista

Chlorophyll less and non cellulosic (chitin)type plants are placed in kingdom Fungi

All photosynthetic plants are placed in-kingdom plantae

All animals with mode of nutrition(ingestion) placed in kingdom animalia.

The characteristics of classification are

1. Cell structure

2. Thallus Organization

3. Mode of nutrition

4. reproduction and

5. Phylogenetic relationships

Kingdom monera:

Types of bacteria:

Based on shape, bacteria are of 4 types

Spherical – Coccus

Rod – shaped – Bacillus

Comma – shaped – Vibrium

Spiral – Spirillum

Based on nutrition, bacteria are of 3 types:

Photosynthetic autotrophic: Bacteria can synthesise their own food by using chlorophyll in the presence of light.

Chemosynthetic autotrophic: Bacteria can synthesise their own food from inorganic substrates.

Heterotrophs: They are depend on other organisms for food.