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Science Distinguish Between.

Introduction to Biotechnology · Maharashtra Board STD 9 (MSBSHSE - English Medium). 3 questions.

Questions

Distinguish Between.

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3 questions · self-marked practice — reveal the answer and mark yourself.

Question 13 Marks
Cartilage and Bone
Answer
CartilageBone
(i) They are present in nose, ear, larynx, trachea.(i) They form the skeleton of the body.
(ii) They contain cells supported by fibrous, flexible, jelly-like ground substance.(ii) They contain osteocytes embedded in solid ground substance made up of calcium phosphate.
(iii) Lubricates the surface of bones, gives support and shape to organs.(iii) Supports and protects different organs, helps in movement.
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Question 23 Marks
Striated muscles and Non-striated muscles.
Answer
Striated musclesNon-striated muscles
(i) Muscle cells are long, cylindrical, multinucleate and have no branches.(i) Muscle cells are short, spindle-shaped, uninucleate and have no branches.
(ii) There are alternate dark and light bands on these muscles and they are attached to bones.(ii) Dark and light bands are absent. Not attached to bones.
(iii) They move as per our will, hence they are called voluntary muscles.(iii) They are not under the control of our will, hence they are called involuntary muscles.
(iv) These muscles bring about movements of arms and legs, running, speaking etc.(iv) These muscles bring about movement of eyelids, passage of food through alimentary canal, contraction and relaxation of blood vessels etc.
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Question 33 Marks
Xylem and Phloem
Answer

Xylem

Phloem

(i) Consists of mostly thick-walled dead cells.

(i) Consists of mostly living cells containing cytoplasm.

(ii) The types of cells include dead cells- tracheids, vessels and xylem fibres and living cells-Xylem parenchyma.

(ii) The types of cells include living cells – Sieve tubes, companion cells, phloem parenchyma and dead cells – phloem fibres.

(iii) Structure like interconnected tubes, conduct water and minerals only in upward direction.

(iii) Tubes joined to each other, conduct sugar and amino acids from leaves to various parts in both upward and downward direction.

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