Companion Cell

Q. What is the function of companion cell?

1. Providing energy to sieve elements for active transport

2. Loading of sucrose into sieve elements by passive transport

3. Providing water to phloem

4. Loading of sucrose into sieve elements

Q.

Vascular tissue contains parenchyma and collenchyma.

1. True
2. False

Q. What is the function of companion cell?

1. Providing energy to sieve elements for active transport

2. Loading of sucrose into sieve elements by passive transport

3. Maintaining pressure gradient in sieve tube

4. Loading of sucrose into sieve elements

Q. Assertion :The vascular cambium is absent in monocots. Reason: The monocots never show secondary growth.

1. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
2. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
3. Assertion is correct but Reason is incorrect
4. Both Assertion and Reason are incorrect

Q. Which of the following statements is/are true?
I. Protoxylem and metaxylem is found in secondary xylem
II. In exarch condition, the protoxylem is towards the periphery
III. Tracheids are the chief water transporting elements in gymnosperms
IV. Companion cell is devoid of the nucleus at maturity

1. I and IV only
2. II and III only
3. III and IV only
4. II and IV only

Q. Tissue found between xylem and phloem bundles of a root is?

1. Vascular parenchyma
2. Conjunctive meristem
3. Parenchyma
4. Conjunctive parenchyma

Q.

Which of the following tissues consist of living cells?

1. Vessels

2. Tracheids

3. Companion cell

4. Sclerenchyma

Q. Name the tissue where cells are living, thin-walled, isodiametric with intercellular spaces

1. Prosenchyma
2. Arenchyma
3. Parenchyma
4. Collenchyma

Q. ______ tissue has live cells.

1. Parenchyma
2. Xylem fibres
3. Tracheids.
4. Vessels

Q. Which type of vascular bundles are found in monocot stem?

1. Collateral, open, endarch
2. Radial, open, diarch
3. Radial, open, mesarch
4. Collateral, closed, endarch

Q. Choose the appropriate terms for the following definitions.
phloem, vascular cambium, mesophyll, schizogenous, dendrochronology, aerenchyma, velamen, tylosis, parenchyma, collenchyma, lysogenous, transfer cell
.......... is a vascular tissue that conducts organic solutes in plants.

Q. Which of the following statements is/are true?
I. Protoxylem and metaxylem is found in secondary xylem
II. In exarch condition, the protoxylem is towards the periphery
III. Tracheids are the chief water transporting elements in gymnosperms
IV. Companion cell is devoid of the nucleus at maturity

1. I and IV only
2. II and III only
3. III and IV only
4. II and IV only

Q. Companion cells are associated with

1. cambium
2. xylem
3. sieve tubes
4. collenchyma

Q. Which of the following statement(s) regarding the companion cell is/are incorrect?
I. These are closely associated with vessels.
II. They help in loading sugar into the phloem.
III. They help in maintaining the pressure gradient in tracheids.

1. Only I
2. Only II
3. I and III
4. I, II and III

Q. While observing the cross section of an angiosperm stem, if you find complex permanent tissue, it could be

1. Sclerenchyma and parenchyma
2. Parenchyma and epidermal tissue
3. Xylem and phloem
4. Epidermal tissue and collenchyma

Q. Which of the following is not a component of a complex tissue?

1. Parenchyma
2. Collenchyma
3. Tracheids
4. Sclerenchyma

Q. The protostele in which xylem core is Smooth and rounded is

1. Haplostele
2. Actinostlele
3. Plectostele
4. Siphonostele

Q. Which of the following are relatively unspecialized cells with a thin cell wall?

1. Collenchyma
2. Sclerenchyma
3. Parenchyma
4. None of the above

Q. Ground tissue includes

1. All tissues internal to endodermis
2. Epidermis and cortex
3. All tissues except epidermis and vascular bundles
4. All tissues external to endodermis

Q.

1. sclerenchyma
2. collenchyma
3. epidermis
4. xylem

Q.

Companion cells are made up of

1. Collenchyma

2. Sclerenchyma

3. Parenchyma

4. Any of these

Q. The stem of Selaginella is anatomically characterised by the presence of

1. Amphiphloic siphonostele
2. Protostele
3. Siphonostele
4. Ectophloic siphonostele

Q.

Which of the following tissues consist of living cells?

1. Tracheids

2. Companion cell

3. Sclerenchyma

4. Vessels