Red tide is coloration of water due to very rapid multiplication of red dianoflagellates. Chemicals released due to this rapid growth are harmful for aquatic life.

RNA of viroids is of low molecular weight when compared to viruses. Viroids are comparatively smaller than viruses. They also lack protein sheath that is found in viruses.

Viruses that infect plants called as plant viruses have single stranded RNA. Animal viruses contain a single/ double stranded RNA or a double stranded DNA. Bacteriophages have double stranded DNA.

Puccina is also called as Rust fungi and is an example of Basidiomycetes. Albugo is also known as Mustard fungi and is an example of Phycomycetes. Rhizopus which is an example of Phycomycetes is also called as Bread mold.

After one budding cycle, number of fertile and barren yeasts are 1 and 1 respectively. After two budding cycles, number of fertile and barren yeasts are 1 and 2 respectively. After n budding cycles, number of fertile and barren yeasts would be 1 and n respectively.
Therefore, after 78 hours number of budding cycles = 78/2 = 39
Since, N₀ = 2, after 78 hours number of fertile and barren yeasts are 2 and 78 respectively.

Slime moulds can reproduce eir sexually or asexually. During favourable conditions y form an aggregation called plasmodium which may grow and spread over several feet. Under unfavourable conditions, plasmodium differentiates to form fruiting bodies bearing spores at ir tips which n get dispersed through air currents. Slime moulds reproduce eir sexually or asexually.

Chrysophytes contain chlorophyll or carotene or xanthophyll in m. Chrysophytes attain color due to se pigments present in m. Their cell wall is rigid and is made up of Cellulose/ Pectin/ Silica.

Aristotle classified organisms as Plants and Animals. He considered Chlorella under category of Plants. His classification didn?t consider structure of cell which resulted in Chlorella under Plants in his classification.

Lichens are co-existence of blue green algae with fungi. Fungus protects algae from sun light. In turn algae provide nutrition for fungus since fungus cannot prepare its own food due to absence of chlorophyll.

In eukaryotes, all cell organelles are separated by a membrane. This membrane is absent in prokaryotes. Whittaker classified all prokaryotes under kingdom Monera. So, nuclear membrane is absent in Monera.