In multicellular organisms there are millions of cells. Most of these cells are specialised to carry out a few functions. Each specialized function is taken up by a different group of cells or tissues. Since these cells of a tissue carry out only a particular function, they do it very efficiently. FRead more
In multicellular organisms there are millions of cells. Most of these cells are specialised to carry out a few functions. Each specialized function is taken up by a different group of cells or tissues. Since these cells of a tissue carry out only a particular function, they do it very efficiently. For example, in human beings, muscle cells contract and relax to cause movement, nerve cells carry messages and blood flows to transport oxygen, food, form ones and waste materials and so on. Likewise, in plants, vascular tissues (xylem, phloem) conduct water and food from one part of the plant to other parts. So, multicellular organisms show division of labour.
(a)They are undergoing divisions (by mitosis) and do not store food. (b) They have lignified walls and form bundles for mechanical function. (c) It has stone cells or sclereids. (d) Collenchyma provides them flexibility. (e) Sclerenchyma fibres are tightly packed.
(a)They are undergoing divisions (by mitosis) and do not store food.
(b) They have lignified walls and form bundles for mechanical function.
(c) It has stone cells or sclereids.
(d) Collenchyma provides them flexibility.
(e) Sclerenchyma fibres are tightly packed.
Water hyacinth (Eichornia crassipes) has spongy petioles which enclose a lot of makes the plant lighter than water so that it is able to float on surface of water.
Water hyacinth (Eichornia crassipes) has spongy petioles which enclose a lot of makes the plant lighter than water so that it is able to float on surface of water.
Where is apical meristem found?
Apical meristem is found in shoot apex and root apex of an angiospermic plant.
Apical meristem is found in shoot apex and root apex of an angiospermic plant.
See lessName three types of simple tissues.
Three types of simple tissues of plants are: 1. Parenchyma 2. Collenchyma; and 3. Sclerenchyma.
Three types of simple tissues of plants are: 1. Parenchyma 2. Collenchyma; and 3. Sclerenchyma.
See lessWhat is the utility of tissues in multicellular organisms?
In multicellular organisms there are millions of cells. Most of these cells are specialised to carry out a few functions. Each specialized function is taken up by a different group of cells or tissues. Since these cells of a tissue carry out only a particular function, they do it very efficiently. FRead more
In multicellular organisms there are millions of cells. Most of these cells are specialised to carry out a few functions. Each specialized function is taken up by a different group of cells or tissues. Since these cells of a tissue carry out only a particular function, they do it very efficiently. For example, in human beings, muscle cells contract and relax to cause movement, nerve cells carry messages and blood flows to transport oxygen, food, form ones and waste materials and so on. Likewise, in plants, vascular tissues (xylem, phloem) conduct water and food from one part of the plant to other parts. So, multicellular organisms show division of labour.
See lessGive reasons for: (a) Meristematic cells have a prominent nucleus and dense cytoplasm but they lack vacuoles (b) Intercellular spaces are absent in sclerencymatous tissue (c) We get a crunchy and granular feeling when we chew pear fruit (d) Branches of a tree move and bend freely in high wind-velocity (e) It is difficult to pull out the husk of coconut.
(a)They are undergoing divisions (by mitosis) and do not store food. (b) They have lignified walls and form bundles for mechanical function. (c) It has stone cells or sclereids. (d) Collenchyma provides them flexibility. (e) Sclerenchyma fibres are tightly packed.
(a)They are undergoing divisions (by mitosis) and do not store food.
See less(b) They have lignified walls and form bundles for mechanical function.
(c) It has stone cells or sclereids.
(d) Collenchyma provides them flexibility.
(e) Sclerenchyma fibres are tightly packed.
Water hyacinth floats on water surface. Explain.
Water hyacinth (Eichornia crassipes) has spongy petioles which enclose a lot of makes the plant lighter than water so that it is able to float on surface of water.
Water hyacinth (Eichornia crassipes) has spongy petioles which enclose a lot of makes the plant lighter than water so that it is able to float on surface of water.
See less