Plant tissues + animal tissues, location and functionPractice Questions & MCQs
Practice Plant tissues + animal tissues, location and function questions from Tissues (Class 9 Science) - important MCQs with answers and step-by-step solutions. Solve the sample questions below, then practice the full set free on the RankByte app.
Plant tissues + animal tissues, location and functionQuiz - Solve & Score
Q1. Which of the following statements about phloem is correct?
- A.It transports food from leaves to other parts and contains sieve tubes, companion cells, phloem parenchyma and phloem fibres
- B.It transports food only downward and is composed entirely of dead cells
- C.It transports water and minerals from roots upward
- D.It is composed only of tracheids and vessels
Answer: A. It transports food from leaves to other parts and contains sieve tubes, companion cells, phloem parenchyma and phloem fibres
What is the textbook's take? Phloem conducts prepared food from leaves to other plant parts in both directions and is composed of sieve tubes, companion cells, phloem parenchyma and phloem fibres - mostly living cells. Water-and-mineral transport is by xylem, and tracheids/vessels are xylem elements. Only option (a) is correct. Pick: A) It transports food from leaves to other parts and contains sieve tubes, companion cells, phloem parenchyma and phloem fibres.
Q2. Which of the following is the principal cell type of areolar tissue?
- A.Fibroblasts and macrophages
- B.Osteocytes only
- C.Chondrocytes only
- D.Multinucleate striated fibres
Answer: A. Fibroblasts and macrophages
To see why, recall that Areolar tissue is a loose connective tissue containing fibroblasts (which secrete collagen and elastic fibres) and macrophages (which engulf debris), embedded in a soft matrix. Osteocytes belong to bone, chondrocytes to cartilage, and multinucleate striated fibres to skeletal muscle. Hence the correct cells are fibroblasts and macrophages. Hence the answer is A) Fibroblasts and macrophages.
Q3. Which is the correct sequence of events in the formation of permanent tissue from meristems?
- A.Cells divide → newly formed cells expand → cells differentiate and lose ability to divide
- B.Cells differentiate → cells expand → cells start dividing actively
- C.Cells expand → cells divide → cells become meristematic
- D.Cells differentiate → cells stop expanding → cells become meristematic
Answer: A. Cells divide → newly formed cells expand → cells differentiate and lose ability to divide
NCERT fact (biology, chapter 'Tissues'): Permanent tissues arise when meristematic cells first divide, then the newly formed cells expand and finally differentiate into specific cell types, losing the ability to divide in the process. The other options reverse or distort this developmental sequence. Final answer - A) Cells divide → newly formed cells expand → cells differentiate and lose ability to divide.
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