The tissue derived directly from the meristem of embryo is called
as................ .
2. A group of cells with similar structure organized to do a common function
is called as................ .
3. Which plant tissue remains in active metabolic state always ?
4. Sieve tubes and companion cells are found in................tissue. (Xylem/
phloem/collenchyma)
5. Long, narrow, dead cells having a thick deposition of lignin in the cell
wall are called................cells. (Parenchyma/cambium/sclerenchyma)
6. Which tissue is responsible for transport of water in plants ?
7. The special property of muscle fibres to contract forcefully and return to
relaxed state is called................ . (excitability/contractibility/flexibility)
8. A branch of science dealing with the study of bones is called................ .
(Ornithology/physiology/osteology)
9. The fluid matrix of blood is called................ . (plasma/lymph/serum)
10. Spindle-shaped, non-striated, involuntary muscle fibres present in hollow
internal organs like urinary bladder are called................ . (smooth muscle
fibres/striated muscle fibres/cardiac muscle fibres)
11. The brain and the spinal cord are made up of................ . (nephrons/
erythrocytes/neurons)
12. The small, branched processes of a nerve cell are called................ .
(dendrites/axons/neurons)
SHORT ANSWER TYPE QUESTIONS (2 Marks)
1. Define tissue.
2. What do you mean by division of labour ?
3. Name the different elements of xylem and phloem.
4. In hydrophytes xylem is less developed. Why ?
5. Write the composition of mammalian blood
Answers
Explanation:
2) tissue
4) xylem
6) xylem
8) orinthology
9) plasma
11) neuron
12) dendrites
1) a group of cell which performs various task is called tissue
Answer:
The tissue derived directly from the meristem of embryo is called
as.....meristematic tissues............ .
2. A group of cells with similar structure organized to do a common function
is called as... tissues....... .
3. Which plant tissue remains in active metabolic state always ?
ANS)Meristematic tissues of plants always remain in the active metabolic state.
They are always in active state because they are capable of undergoing continuous cell division which helps in plant growth. They undergo specialization and form permanent tissue.
They usually occur at the shoot tip and root tip in plants.
4. Sieve tubes and companion cells are found in.......pholem....tissue. (Xylem/
phloem/collenchyma)
5. Long, narrow, dead cells having a thick deposition of lignin in the cell
wall are called......sclerenchyma..........cells. (Parenchyma/cambium/sclerenchyma)
6. Which tissue is responsible for transport of water in plants ?
Ans Xylem
7. The special property of muscle fibres to contract forcefully and return to
relaxed state is called......elasticity........... . (excitability/contractibility/flexibility)
8. A branch of science dealing with the study of bones is called....Ornithology............ .
(Ornithology/physiology/osteology)
9. The fluid matrix of blood is called........plasma........ . (plasma/lymph/serum)
10. Spindle-shaped, non-striated, involuntary muscle fibres present in hollow
internal organs like urinary bladder are called........smooth muscle........ . (smooth muscle
fibres/striated muscle fibres/cardiac muscle fibres)
11. The brain and the spinal cord are made up of.......central nervous system......... . (nephrons/
erythrocytes/neurons)
12. The small, branched processes of a nerve cell are called.....neutrons........... .
(dendrites/axons/neurons)
SHORT ANSWER TYPE QUESTIONS (2 Marks)
1. Define tissue
.Ans)A group of similar or dissimilar cells which performs essentially the same function and has a common origin is called a tissue.
2. What do you mean by division of labour ?
ans)Division of labour, the separation of a work process into a number of tasks, with each task performed by a separate person or group of persons. It is most often applied to systems of mass production and is one of the basic organizing principles of the assembly line.
3. Name the different elements of xylem and phloem.
ans)It consists of tracheids, vessel elements, xylem parenchyma, xylem sclerenchyma and xylem fibres. It consists of four elements: companion cells, sieve tubes, bast fibres, phloem fibres, intermediary cells and the phloem parenchyma
4. In hydrophytes xylem is less developed. Why ?
ans)The plant does not need well developed xylem tissues in order to keep water balance as water can enter directly into the leaves and stem via osmosis. Xylem is less develop in hydrophytes because hydrophytes has access to abundant water
5. Write the composition of mammalian blood
ans) The plant does not need well developed xylem tissues in order to keep water balance as water can enter directly into the leaves and stem via osmosis. Xylem is less develop in hydrophytes because hydrophytes has access to abundant water
Explanation:
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