Algae and Protozoans

All algae species exclusively reproduce asexually, ensuring rapid population growth in stable environments.

Chlorophyta, known as green algae, are classified based on their primary photosynthetic pigment, chlorophyll, which gives them their characteristic color.

The cell walls of Rhodophyta, commonly known as red algae, contain a substance called cellulose, which is extracted for various industrial applications.

Phaeophyta, or brown algae, are characterized by their vibrant blue pigments that enable them to absorb blue light in deep ocean environments.

Chrysophyta, including golden algae and diatoms, have cell walls enriched with chitin, providing structural support in aquatic habitats.

Diatoms, a subgroup of Chrysophyta, contribute significantly to global oxygen production, rivaling terrestrial forests in their photosynthetic output.

Protozoans share cellular characteristics with prokaryotes, including the absence of a nucleus and other membrane-bound organelles.

Protozoans possess a rigid cell wall composed of peptidoglycan, similar to bacteria, which provides structural support and protection.

The motility of protozoans is enhanced by external desiccation, allowing them to move more freely in dry environments.

The trophozoite form of a protozoan is a metabolically inactive, dormant stage that allows the organism to survive harsh conditions.

Protozoan cysts are formed during favorable environmental conditions to promote rapid reproduction and colonization.

Schizogony, a form of asexual reproduction in protozoans, involves the division of the cytoplasm before nuclear division.

Algae are classified into four main groups based on their method of reproduction.

Diatoms, being a type of algae, contribute negligibly to the Earth's oxygen production due to their small size.

All protozoans are harmful parasites, causing diseases in humans and animals.

The process of schizogony in protozoans results in only two daughter cells, similar to binary fission.

Algae, including Chlorophyta and Rhodophyta, are exclusively found in freshwater environments.

The presence of silica in the cell walls of diatoms makes them highly susceptible to decomposition in aquatic environments.

The cyst form of protozoans is metabolically active, allowing them to actively hunt for food even in adverse conditions.

Algae are exclusively multicellular organisms with complex tissue differentiation, similar to plants.

Agar, derived from Rhodophyta, is primarily used in the cosmetics industry for its moisturizing properties.

Phaeophyta are known for storing energy in the chemical form of starch.

Chrysophyta can be identified due to presence of phycobilins that give them their color.

Protozoans are the only microorganisms that lack the ability to reproduce sexually.

Schizogony is a process where a protozoans splits evenly into two identical daughter cells.

Algae are considered a monophyletic group because they all share a single common ancestor.

Rhodophyta's red pigments, phycoerythrins, allow them to efficiently photosynthesize in shallow waters.

Phaeophyta's brown color is due to the presence of large quantities of chlorophyll a and b.

Chrysophytes are typically found in terrestrial environments due to their tolerance to dry conditions.

Protozoans exclusively obtain nutrients through photosynthesis.

The cyst stage of a protozoan is typically larger and more metabolically active than the trophozoite stage.

The type of asexual reproduction seen in some protozoans that is known as schizogony only occurs through the division of the cytoplasm.

Green algae, or Chlorophyta, exclusively reside in terrestrial environments, thriving in moist soil and shaded areas.

Red algae, can survive in deeper waters due to their accessory pigments, which allow them to utilize blue and green light.

Phaeophyta are the main sources of O2.

Chrysophyta gets unique name because its cell walls are crystaline

Protozoans have cell walls.

Protozoans do not usually need moisture to survive.

Cysts are a motile active feeding form.

Schizogony means that the cytoplasm divides before the nucleus.