II. Wolffia: Also known as Asian …

II. Wolffia: Also known as Asian watermeal and duckweed, Wolffia Globosa is a species of flowering plant that grows on calm water surfaces of freshwater ponds, lakes and marshes. It is native to Asia and is also found in some parts of the Americas, as a native or naturalised species. These floating, rootless plants are the world's smallest flowering plants. An average individual plant is 0.6 mm long and 0.3 mm wide. It weighs about 150 micrograms, the approximate weight of 2-3 grains of table salt. Fig. 1.4, Wolffia; Image by Christian Fischer via Wikimedia Commons A water molecule is of the order of size 10 m; this means that a Wolffia plant is about 10 Question 6 times larger than the water molecule and the Earth is about 1016 times larger than the water molecule. Which one of the statements below correctly relates the size of Wolffia and the Earth? a. The Earth is about 10" times larger than a Wolffia plant b. The Wolffia is about (1000) the size of the Earth Answer c. The Earth is 102 times the size of Wolffia d. The Earth is about 100 times larger than a Wolffia plant

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