Question

27 Write short notes on mitochondria, golgi body, ribosome, plastid and its type.
28. Explain plants and animal tissue in details.
29. Draw ray diagram of carbon, N2, 02 cycles
30 Explain chart of 5 kingdom classification in detail.
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Answer 1

Answer:

27.Mitochondria are known as the powerhouses of the cell. They are organelles that act like a digestive system which takes in nutrients, breaks them down, and creates energy rich molecules for the cell. The biochemical processes of the cell are known as cellular respiration.

Golgi body, is a membrane-bound organelle found in eukaryotic cells (cells with clearly defined nuclei) that is made up of a series of flattened stacked pouches called cisternae. It is located in the cytoplasm next to the endoplasmic reticulum and near the cell nucleus.

When a cell needs to make proteins, it looks for ribosomes. Ribosomes are the protein builders or the protein synthesizers of the cell. They are like construction guys who connect one amino acid at a time and build long chains. Ribosomes are special because they are found in both prokaryotes and eukaryotes.

Plastids are the site of manufacture and storage of important chemical compounds used by the cell. They often contain pigments used in photosynthesis, and the types of pigments in a plastid determine the cell's color.

28.An organ is group of tissues grouped together and working together. Plant tissues include xylem, phloem, collenchyma, sclerenchyma, epidermis and meristematic tissue. Animal tissues include epithelial tissue, connective tissue, muscle tissue and nerve tissue.

30.The five-kingdom system of classification for living organisms, including the prokaryotic Monera and the eukaryotic Protista, Fungi, Plantae and Animalia is complicated by the discovery of archaebacteria

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