Biology - Mock Test 177

Question 1761

In roots the lateral root originates from?

A) Cortex B) Endodermis C) Epidermis D) Pericycle

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Question 1762

Which one of the following is an internal secretory structure ?

A) Passage cell B) Lysigeneous cavity C) Resin duct D) Stone cell

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Question 1763

Companion cell is?

A) Dead B) Enucleated C) Living and thickened D) Nucleated

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Question 1764

The tissue in roots which acts as check dam against water is?

A) Hypodermis B) Passage cells C) Endodermis D) Pericycle.

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Question 1765

Phelloderm is formed of?

A) Phellem + phellogen B) Periderm + phellogen C) Phellem + periderm D) Periderm-phellogen and phellem

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Question 1766

Companion cell regulates the activities of?

A) sieve cell B) sieve elements C) sieve tube D) sieve plates

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Question 1767

Growth rings are produced due to activity of?

A) Extrastealar cambium B) Interstealar cambium C) Intrastealar cambuim D) b & C both

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Question 1768

Root has always?

A) Endarch xylem B) Tetrach stele C) Exarch xylem D) Palyarch stele.

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Question 1769

What is the0 normal appereance of stone cells ?

A) Hexagonal B) Round C) Isodiamatric D) Ova

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Question 1770

The ends of tracheids are?

A) Projected B) Flat C) Perforated D) Wall less

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