Blue green algae have been included under Monera and not under the kingdom plantae explain
Answers
Characteristics of Monera and Plantae
Explanation:
Kingdom Monera
The kingdom prokaryotes are divided into two sub kingdoms:
Archae-bacteria.
Eubacteria.
Archaebacteria
Most Archaebacteria are autotrophs and only photosynthesize.
They derive energy for metabolic activities from oxidation of chemical energy resources like ammonia, methane, etc.
They are divided into 3 groups -
- Methanogens: produce methane
- Thermoacidophiles: They favour hot and acidic environment and use hydrogen sulphide as energy source.
- Halophiles - They grow in salty environment (alkaline).
Eubacteria
- They have outer cell wall that surrounds plasma membrane.
- A circular strand of DNA is present.
The bacteria are of different shapes like:
1.Bacilli (rod shaped).
2. Cocci (spherical).
3. Spirillium (spiral).
4. Vibrio (comma).
Classification of gram +ve and gram -ve
- Gram positive bacteria: Stains red with gram stain.
- Gram negative bacteria: Do not stains red.
Kingdom Plantae
It includes multicellular organisms except the primitive algae.
They are eukaryotes.
Cell wall consists of cellulose.
They have double membrane organelles plastids
• Some plastids have photosynthetic pigment called chloroplast.
• They are autotrophic.
• Growth is indefinite.
• Body form is irregular as it possesses branches.
Kingdom Plantae
• It includes multicellular organisms except the primitive algae.
• They are eukaryotes.
• Cell wall consists of cellulose.
• A mature plant cell has a large vacuole for storing food in the form of starch.
• They have double membrane organelles plastids
• They are autotrophic.
• Growth is indefinite.
Blue green algae possess characters similar to Monera , that is why grouped under monera and not under Plantae .