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1) Open-pollination: Open-pollinated or “standard” varieties of seeds breed true to their type. Seeds saved from such plants will produce a...

Snake Giving Birth Most snakes hatch from eggs that have been laid outside the mother’s body. But some kinds of snakes give birth to live yo...

I INTRODUCTION Topology , branch of mathematics that explores certain properties of geometrical figures. In 1930, the word topology was coi...

WHAT IS A HABITAT ? A habitat is a place where a plant or animal normally lives. Fish live in water. Perch are fish that live in freshwater ...

WHAT IS A FOOD CHAIN? A food chain is the way energy goes from one living thing to another through food. Plants are the first step in most f...

Fluke : Fluke (invertebrate), common name given to members of a class of parasitic flatworm . They vary in length from 0.2 to 165 mm (up to ...

Marigold : Marigold, common name for several related plants of the daisy family that typically have orange to yellow flowers. True marigolds...