OBJECTIVE LIFE SCIENCE
DIVERSITY AMONG LIFE FORMS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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It can move and eat
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It can live independently and shows multiple characteristics of life
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It can live independently and shows all characteristics of life
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It shows all characteristics of life
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Detailed explanation-1: -Unicellular organisms are made up of a single cell and perform all the life processes for survival and independent existence. Hence, the cell is called as the fundamental structural and functional unit of life.
Detailed explanation-2: -A unicellular organism is an organism that consists of a single cell. This means all life processes, such as reproduction, feeding, digestion, and excretion, occur in one cell. Amoebas, bacteria, and plankton are just some types of unicellular organisms.
Detailed explanation-3: -A single cell by itself can form an entire living organism. Organisms consisting of only a single cell are called unicellular. A bacterium or a protist like amoebas and paramecia are unicellular. However, most of the organisms you are familiar with, such as dogs and trees, are multicellular.
Detailed explanation-4: -All single-celled organisms contain every structure they need to survive within their one cell. They have structures to get energy from complex molecules, structures to help them move, and structures to help them sense their environment.