Where semi-formal is a step down from formal, semi-casual is a step up from casual.kirt or dresses for women is allowed. Button-down dress shirts, sweaters or polo shirts are great for men and women. Men may also wear a necktie but for semi-casual it s not expected. For a casual affair such as church, dinner at a friend s home, yachting or casual dining, a nice jacket or sweater for men is best.
Home Â» Algae. Definition. noun, singular: alga. A group of photosynthetic organisms that in general possess pigments such as chlorophyll but lack true roots, stems and leaves characteristic of terrestrial plants. algal (adjective) Of, pertaining to, characteristic of, or relating to an alga. Supplement.
Brown algae is the largest type of algae. Brown algae is in the phylum Phaeophyta, which means dusky plants.. Brown algae is brown or yellow-brown in color and found in temperate or arctic waters. Brown algae typically have a root-like structure called a holdfast to anchor the algae to a surface.. Green Algae-the Chlorophyta. There are more than 4,000 species of green algae. Green algae may be found in marine or freshwater habitats, and some even thrive in moist soil. These algae come in 3 forms: unicellular, colonial or multicellular.