NEET BIOLOGY

Detailed explanation-1: -No, bacteria are not animals. Although bacteria does share some characteristics with animals, for example, bacteria produces a typical nucleic acid that are found in parts of the human pancreas, spleen, and sperm. There are 39 trillion bacterial cells in the human body, which make up about 30% of our cell composition.

Detailed explanation-2: -Bacteria cells are very different from animal, plant or fungal cells. They don’t have organelles such as nuclei, mitochondria or chloroplasts. Although they do have ribosomes and a cell wall, these are both different in structure to the ribosomes and cell walls in the cells above.

Detailed explanation-3: -Bacteria are unicellular, living organisms which have been grouped into the prokaryotic cell, as these organisms lack a few membrane-bound organelles and the nucleus, which is considered to be one of the most important cell organelles.

Detailed explanation-4: -Animalcule (’little animal’, from Latin animal + the diminutive suffix-culum) is an old term for microscopic organisms that included bacteria, protozoans, and very small animals. The word was invented by 17th-century Dutch scientist Antonie van Leeuwenhoek to refer to the microorganisms he observed in rainwater.

Detailed explanation-5: -Since bacterial cells are prokaryotic cells, they do not membrane-bound organelles. All the cellular contents are openly accessible within the cytoplasm in prokaryotes. Animal cells consist of membrane-bound organelles such as nucleus and mitochondria. This is the main difference between bacterial cell and animal cell.