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its class 9th questions
sci chapter 6
Answers
Answer:
1. Plant tissue - plant tissue is a collection of similar cells performing an organized function for the plant. Each plant tissue is specialized for a unique purpose,and can be combined with other tissues to create organs such as flowers,leaves,stems and roots.
2. The above picture
3.The meristem is a type of tissue found in plants. It consists of undifferentiated cells capable of cell division. Cells in the meristem can develop into all the other tissues and organs that occur in plants. These cells continue to divide until a time when they get differentiated and then lose the ability to divide.
4.Metastases are formed by cancer cells that have left the primary tumor mass and traveled by the body's highways—blood and lymphatic vessels— to seek out new sites throughout the body where they may found new colonies. ( Picture) .
5. There are three types of meristematic tissues: apical (at the tips), intercalary (in the middle), and lateral (at the sides). At the meristem summit, there is a small group of slowly dividing cells, which is commonly called the central zone.
Functions
The cells have no intercellular space. The zone where these cells exist is known as meristem. The cells of the meristematic tissue divide actively to form specialized structures such as buds of leaves and flowers, tips of roots and shoots, etc. These cells help to increase the length and girth of the plant.
Locations
Meristems are classified by their location in the plant as apical (located at root and shoot tips), lateral (in the vascular and cork cambia), and intercalary (at internodes, or stem regions between the places at which leaves attach, and leaf bases, especially of certain monocotyledons—e.g., grasses).
Answer:
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