The Nucleic Acids

These are molecules that are essential to and characteristic of life on earth. They form the genetic material of all living organisms including the simplest virus. These compunds are found mainly in the nucleus.

They are DNA (Deoxyribonucleic acid) and RNA (Ribonucleic acid). Nucleic acids have the same basic structure in all organisms.

Excerpts from the book a glance at cell biology by Ukponmwan Ifueko Oghogho

Available @

https://www.morebooks.de/gb/search?utf8=%E2%9C%93&q=Ukponmwan+ifueko+oghogho+

amazon.com/author/ifuekoukponmwan

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problem of plant living in fresh water habitat

Buoyancy The density of fresh water is considerably less than that of the sea and such floatation is a greater problem for fresh water plankton. There is occasional flooding which submerges the plants. The water lilies, water lettuce, water hyacinth are able to stay afloat because of the air spaces in the lower part of the leaves as well as in the skins and roots.

SCIENCE is life

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