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Anatomy of Plants

Description: This test is standardised achievment test in Biology suitable for the students of icse and all other boards of class 7 and also useful for the students of different competitions and olympiads.
Number of Questions: 20
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Tags: plant tissues Plant Tissue Biology
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Which of the following tissues is composed of cells with primary walls thickened at the corners that provide support for immature parts of the cell body?

  1. Xylem

  2. Phloem

  3. Collenchyma

  4. Sclerenchyma

  5. Parenchyma


Correct Option: C
Explanation:

The cells of collenchyma are thickened at the corners. These tissue gives strength to the part in which it is present.

For a critical study of secondary growth in plants, which of the following plants is suitable?

  1. Sugarcane

  2. Fern

  3. Teak

  4. Wheat

  5. Coconut


Correct Option: C
Explanation:

Yes, as teak is a dicot plant and all dicot plants show secondary growth.

Anatomically, jute fibres are ____________________.

  1. xylem fibres

  2. bast fibres

  3. rayon fibres

  4. pith fibres

  5. cortical fibres


Correct Option: B
Explanation:

Yes, jute fibres are bast (phloem) fibres anatomically.

Which one of the following is an embryonic tissue type found at the apex of roots and shoots?

  1. Apical meristem

  2. Lateral meristem

  3. Ground tissue

  4. Parenchyma tissue

  5. Vascular tissue


Correct Option: A
Explanation:

These cells divide rapidly and continuously and are present at the apices of roots, shoots and leaves.

Which of the following is a primary meristem?

  1. Intercalary meristem

  2. Vascular cambium

  3. Cork cambium

  4. Lateral meristem

  5. Arenchyma


Correct Option: A
Explanation:

The meristem which, lies between the regions of permanent tissues, is called intercalary meristem.This is a primary meristem because its cells continue to divide to produce new cells and add to the length of the plant or its organ.

Companion cells are found in

  1. xylem

  2. phloem

  3. both xylem and phloem

  4. parenchyma

  5. collenchyma


Correct Option: B
Explanation:

Companion cells are found in phloem

Which is correct about transport of conduction of substances?

  1. Organic food moves up through phloem and down by xylem.

  2. Organic food moves up through xylem.

  3. Inorganic food moves upward and downward through xylem.

  4. Organic food moves upward and downward through phloem.

  5. Both inorganic and organic food moves upward through phloem.


Correct Option: D
Explanation:

Phloem is the food conducting tissue of plants. All organic food made in leaves move upward and downward through phloem.

In which of the following types of tissue does the inner wall of cell show the deposition of pectin?

  1. Chlorenchyma tissue

  2. Parenchyma tissue

  3. Sclerenchyma tissue

  4. Collenchyma tissue

  5. Meristematic tissue


Correct Option: D
Explanation:

The inner wall of collenchymatous cells shows the deposition of pectin.

The term parenchyma was given by

  1. Mattenius

  2. Schleiden

  3. N. Grew

  4. Nageli

  5. M. Malpighi


Correct Option: C
Explanation:

The term parenchyma has been given by N. Grew.

Which of the following cells consist of an organised and differentiated cellular structure having cytoplasm without any nucleus at maturity?

  1. Phloem parenchyma

  2. Xylem parenchyma

  3. Tracheids

  4. Sieve tubes

  5. Companion cells


Correct Option: D
Explanation:

Sieve tube is an organised and differentiated cellular structure having cytoplasm without any nucleus. However, nucleus is present in young cells, but mature sieve tube element lacks nucleus. Its functions are controlled by the nucleus of companion cells.

Which of the following plant cells show totipotency?

  1. Cork cells

  2. Bast fibres

  3. Sieve tubes

  4. Xylem vessels

  5. Meristem


Correct Option: E
Explanation:

Totipotency is the capability of developing into a complete organism or differentiating into any of its cells or tissues. Meristem tissue has the ability to divide and grow.

Which of the following cells are present in angiosperms, but absent in pteridophytes and gymnosperms?

  1. Tracheids

  2. Sieve tubes

  3. Companion cells

  4. Phloem fibres

  5. Xylem parenchyma


Correct Option: C
Explanation:

Companion cells are absent in the phloem of pteridophytes and gymnosperms, while present in the phloem of angiosperms.

Which of the following parenchyma cells protect plants from infection and drying out?

  1. Palisade parenchyma

  2. Spongy parenchyma

  3. Secretory parenchyma

  4. Epidermal parenchyma

  5. Storage parenchyma


Correct Option: D
Explanation:

Epidermal parenchyma cells constitute the protective layer of epidermis, which protect plants from infection and drying out.

Dalchini is obtained from the bark of

  1. Acacia

  2. Betula

  3. Cinnamon

  4. Salix

  5. Chinchona


Correct Option: C
Explanation:

Yes, dalchini is obtained from the bark of cinnamon and is used as a spice.

Many chloroplasts are found in

  1. palisade tissue

  2. spongy tissue

  3. sclereids

  4. xylem

  5. phloem


Correct Option: A
Explanation:

Palisade mesophyll tissue of parenchyma is adapted for photosynthesis, so large number of chloroplasts are found in it.

Which of the following is not true about ‘sclereids’?

  1. These are groups of living cells.

  2. These are found in nut shells, guava pulp and pear.

  3. These are also called stone cells.

  4. These are form of sclerenchyma with fibres.

  5. These provide protection/support.


Correct Option: A
Explanation:

Sclereids are a type of sclerenchyma cells. These are dead cells and do not perform any metabolic functions.

Axillary bud and terminal buds are derived from the activity of which of the following?

  1. Apical meristem

  2. Lateral meristem

  3. Both apical and lateral meristem

  4. Intercalary meristem

  5. Parenchyma


Correct Option: A
Explanation:

Apical meristems are situated at the tips of the root and shoot. They take part in initial growth.

Which of the following statements is not true about the primary plant growth?

  1. Only woody plants show primary growth.

  2. Primary growth increases the length of the plant.

  3. The ground meristem is a primary meristem that produces ground tissues.

  4. The procambium is a primary meristem that produces primary vascular tissues.

  5. The protoderm is a primary meristem that produces the more mature dermal tissue.


Correct Option: A
Explanation:

No, it is not true because all plants show primary growth. Primary growth is the growth that occurs as a result of cell division at the tips of stems and roots, and gives rise to primary tissue.

Which of the following groups of tissues was discovered by Nageli (1858)?

  1. Both simple permanent and complex permanent tissues

  2. Meristems and simple permanent tissues

  3. Meristems and complex permanent tissues

  4. Only meristems

  5. Simple permanent tissues


Correct Option: C
Explanation:

Nageli discovered meristems as well as complex permanent tissues (xylem and phloem).

Which one of the following cells is more efficient in conducting water than others?

  1. Sieve tube element

  2. Companion cell

  3. Tracheid

  4. Sclereid

  5. Vessel element


Correct Option: E
Explanation:

Vessel is more efficient in water conduction because vessels are interconnected with each other by means of pores (perforations) though which water moves up fast.

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