AP BIOLOGY

Detailed explanation-1: -Most plants are multicellular organisms. Green plants obtain most of their energy from sunlight via photosynthesis by primary chloroplasts that are derived from endosymbiosis with cyanobacteria. Their chloroplasts contain chlorophylls a and b, which gives them their green color.

Detailed explanation-2: -angiosperm, also called flowering plant, any of about 300, 000 species of flowering plants, the largest and most diverse group within the kingdom Plantae. Angiosperms represent approximately 80 percent of all the known green plants now living.

Detailed explanation-3: -Flowering plants:-Angiosperms are the most advanced plants which produce flowers. Hence, angiosperms are called flowering plants. A flower is the characteristic feature of angiosperms and the unit of sexual reproduction. Angiosperms are mainly categorized into two groups viz. monocots and dicots.

Detailed explanation-4: -"Flowering plants are the most abundant and ecologically successful group of plants on earth, ” said Brodribb. “One reason for this dominance is the relatively high photosynthetic capacity of their leaves, but when and how this increased photosynthetic capacity evolved has been a mystery."