Science homework 1. Name the types of simple permanent tissues. 2. Explain about the different types of parenchyma tissues. 3. Name the different types of cells in xylem and phloem. 4. Why sclerenchyma cells are called as lignified cells?
Answers
Explanation:
1.Simple permanent tissues. epidermis. parenchyma. collenchyma. sclerenchyma.
Complex permanent tissues. xylem vessels (made up of tracheids and vessels) phloem vessels (made up of sieve tubes and companion cells)
2.Thin primary cell wall Alive at maturity Retain the capacity to divide Photosynthesis Food storage Wound healing and tissue regeneration
3.Xylem and Phloem are two different types of vascular tissues, which are mainly involved in the transportation process.
4.The thickened, secondary walls are lignified to provide support to the surrounding plant tissues. The three types of ground, or fundamental, tissue in plants. ... Unlike collenchyma, mature cells of this tissue are generally dead and have thick walls containing lignin. Their size, shape, and structure vary greatly.
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