Diversity in Living Organisms

Slime molds are saprophytic protists. They feed on decaying twigs and leaves by engulfing organic material.

Euglenoids are mixotrophic; they are photosynthetic in the presence of sunlight but behave as heterotrophs in the absence of light.

Euglenoids are mostly fresh water organisms found in stagnant water. They possess a flexible body due to the pellicle.

Instead of a cell wall, euglenoids have a protein-rich layer called a pellicle, which makes their body flexible.

Dinoflagellates are mostly marine, photosynthetic, and possess two flagella, making all the provided statements correct.

The cell walls of diatoms are embedded with silica, making them indestructible and forming 'diatomaceous earth' after they die.

Yeast is a unicellular fungus. In the Whittaker five-kingdom system, all unicellular eukaryotic organisms are placed in the kingdom Protista.

Golden algae are included in Chrysophytes. The name 'chrysophyte' comes from Greek 'chrysos' meaning gold, referring to the golden color of these algae due to accessory pigments. Dinoflagellates have different pigments, protozoa are heterotrophs, and 'slime moukds' is a misspelling.

The kingdom Protista consists of organisms that are eukaryotic and primarily unicellular. Therefore, it includes both characteristics.

Mycoplasma are often called the jokers of the plant kingdom because they lack a cell wall and can change their shape, making them pleomorphic.

Mycoplasma are unique among prokaryotes because they completely lack a cell wall, which makes them resistant to many antibiotics that target cell wall synthesis.

PPLO stands for Pleuropneumonia-like organisms, which is another name for Mycoplasma.

Monera (kingdom of prokaryotes) includes all prokaryotic organisms: Archaebacteria (ancient bacteria), Eubacteria (true bacteria), and Mycoplasma (wall-less bacteria grouped under eubacteria in modern classification). Since all are prokaryotes belonging to Monera, option D 'All' is correct.

Peptidoglycan is a characteristic component of the cell wall in Eubacteria (true bacteria). Archaebacteria have different cell wall compositions, and Mycoplasma lack a cell wall entirely.