The endosperm is important because it is the main source of food for the embryo. In gymnosperms it is haploid and forms a continuation of the female gametophyte. In angiosperms, on the other hand, it is a new structure formed in most cases as the result of a fusion of …

Pyrrophyta or fire algae is a division of unicellular algae that has a yellow brown color, and has two different flagella which are ribbon-shaped. It contains some pigments (chlorophyll-a, chlorophyll-b, c1, c2 and fucoxanthin) that can photosynthesize. Early botanists classified dinoflagellates as a separate division of algae, which they named …

Classification of Global climate The earth can be divided into the following broad climatic zones: Polar and subpolar zone Temperate zone Subtropical zone Tropical zone According to Koppen-Geiger classification, global climate can be divided into the following 6 types: Type A: Equatorial Type B: Arid Type C: Temperate Type D: Cold …