CLINICAL MEDICINE

Detailed explanation-1: -Why are algae considered plant-like? The main reason is that they contain chloroplasts and produce food through photosynthesis. However, they lack many other structures of true plants. For example, algae do n ot have roots, stems, or leaves.

Detailed explanation-2: -Algae are simple, aquatic, plant-like organisms that do not have true roots, stems and leaves.

Detailed explanation-3: -Many species of algae, like larger seaweeds and giant kelp, appear similar to plants (Figs. 2.3 C and D). However, these algae are not true plants. Algae lack the vein-like vascular system found in most plants. Algae are considered the most important photosynthetic organisms on Earth.

Detailed explanation-4: -Phytoplankton are microscopic marine algae. In a balanced ecosystem, they provide food for a wide range of sea creatures. Phytoplankton, also known as microalgae, are similar to terrestrial plants in that they contain chlorophyll and require sunlight in order to live and grow.

Detailed explanation-5: -Algal cell walls are similar to those of plants, and many contain specific polysaccharides that are useful for taxonomy. Unlike those of plants and algae, fungal cell walls lack cellulose entirely and contain chitin.