Kingdom Protista

Photosynthetic bacteria have pigments in structures called chromatophores. Chromatophores are the extensions of cytoplasmic membranes. These are membrane-bound vesicular structures that contains photosynthetic pigments. These structures also carry electron carriers and enzymes for the process of photosynthetic phosphorylation. Chromatophores contains pigments like bacteriopheophytin and bacteriochlorophyll.

The other options are incorrect:

• Chromoplasts - These are plastids, responsible for the synthesis and storage of pigments in photosynthetic eukaryotes.
• Leucoplast - These are the colorless organelles present in plants. They are used for storage of starch or oil.
• Chloroplast - Chloroplasts are found in plant cells and act as the site of photosynthesis in plants.

The correct answer is:

Option 1: The walls of diatoms are easily destructible

Explanation:

Option 1: The walls of diatoms are easily destructible: This is incorrect. Diatoms have silica-based cell walls that are quite strong and durable. These cell walls are known as frustules, and they are highly resistant to decay and damage. Their rigid and intricate structures are not easily destructible.

Option 2: 'Diatomaceous earth' is formed by the cell walls of diatoms: This is correct. Diatomaceous earth is formed from the fossilized remains of diatoms. When diatoms die, their silica-rich cell walls accumulate on the ocean floor, and over time, they form a sedimentary rock called diatomaceous earth.

Option 3: Diatoms are chief producers in the oceans: This is correct. Diatoms are photosynthetic organisms and play a key role in the marine ecosystem. They are one of the most important groups of primary producers in the ocean, contributing significantly to the marine food chain.

Option 4: Diatoms are microscopic and float passively in water: This is correct. Diatoms are microscopic algae that float passively in the water, primarily in the photic zone of the ocean. Their unique silica cell walls help them maintain buoyancy.

Summary:

The wrong statement is Option 1 because diatom walls are not easily destructible; they are strong and resistant due to their silica content.