1.How many species of plants are estimated to live in the ocean? a) 6.5 million b) 2.2 million c) 4,00,000 d) 8.7 million Answer: b) 2.2 million 2.What is the total estimated number of plant species on Earth? a) 6.5 million b) 8.7 million c) 4,00,000 d) 10 million Answer: b) 8.7 million 3.How many species of flowering plants are there on Earth? a) 4,00,000 b) 2.2 million c) 8.7 million d) 6.5 million Answer: a) 4,00,000 4.Plants living on land make up how many million species? a) 2.2 million b) 6.5 million c) 4,00,000 d) 8.7 million Answer: b) 6.5 million 5.What is the estimated number of flowering plant species on Earth? a) 2.2 million b) 4,00,000 c) 6.5 million d) 1 million Answer: b) 4,00,000 6.Which of the following is a flowering plant? a) Bryophyta b) Pteridophyta c) Phenerogams d) Thallophyta Answer: c) Phenerogams 7.Which group of plants includes non-flowering plants? a) Phenerogams b) Cryptogams c) Angiosperms d) Gymnosperms Answer: b) Cryptogams 8.The word "Algae" i