From evolutinary point of view, tracheids and sieve cells are more primitive than tracheae and sieve tubes respectively. The angiosperms have

1.  Tracheae and sieve tubes

2.  Tracheids,Tracheae and sieve tubes

3.  Tracheae,sieve cells and sieve tubes

4.  Tracheids,Tracheae and sieve cells

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4
Correct Answer :

Tracheids,Tracheae and sieve tubes


Explanation :
No Explanation available for this question

Arrange the following in the order of their location from periphery to centre in the entire dicotyledonous plant body (I)Fusiform cells (II) Trichoblasts (III) Collocytes (IV) Tyloses

1.  IV, I, II, III

2.  II, III, I, IV

3.  III, II, I, IV

4.  I, IV, III, II

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4
Correct Answer :

II, III, I, IV


Explanation :
No Explanation available for this question

Assertion (A) : Apical and intercalary meristems contribute to the growth in length while the lateralmoristems bring increase in girth in maize.Reason (R) : Apiral and intercalary meristams always increase the height of plants

1.  Both A and R are true and R is the correct explanation of A

2.  Both A and R are true,but R is not the correct explanation of A

3.  A is true,but R is false

4.  A is false,but R is true

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4
Correct Answer :

A is false,but R is true


Explanation :
No Explanation available for this question

In garden pea yellow colour of cotyledons is dominant over green and round shape of seed is dominant over wrinkled.When a plant with yellow and round seeds is crossed with a plant having yellow and wrinkled seeds,the progeny showed segregation for all the four characters. The probability of obtaining green round seeds in the progeny of this cross is

1.  1/4

2.  1/8

3.  1/16

4.  3/16

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4
Correct Answer :

1/8


Explanation :
No Explanation available for this question

A homozygous sweet pea plant with blue flowers (RR) and long pollen (RoRo) is crossed with a homozygous plant having red flowers (rr) and round,pollen (roro).The resultant F1 hybrid is test crossed. Which of the following genotype does not appear in its progeny

1.  RRRoRo

2.  RrRro

3.  Rrroro

4.  rrRoro

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4
Correct Answer :

RrRro


Explanation :
No Explanation available for this question

Two adjacent filaments of Spirogyra affinis each 10 cells participating in reproduction.How many new Spirogyra plants are produced during sexual reproduction

1.  5

2.  10

3.  20

4.  40

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4
Correct Answer :

10


Explanation :
No Explanation available for this question

Arrange the following in correct sequence with reference to sexual reproduction in Rhizopus (I) Formation of germ tube. (II) Formation of zygophores. (III) Formation of warty wall layer of zygospore. (IV)Secretion of trisporic acid.The correct sequence is

1.  IV,III, II, I

2.  IV, II, III, I

3.  II, I, IV,III

4.  I, III, II, IV

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4
Correct Answer :

IV, II, III, I


Explanation :
No Explanation available for this question

Which of the following taxa shows zooidogamous oogamy (I) Spirogyra (II) Funaria(III) Pteris (IV) Cycas

1.  I, II, III

2.  I, III, IV

3.  I, II, IV

4.  II, III, IV

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4
Correct Answer :

II, III, IV


Explanation :
No Explanation available for this question

The Scientist who through his extensive researches found that the regular recurrence of rust disease every year on wheat plants in India is due to the pathogenic fungal inoculum carried through wind currents from hills to plains

1.  M.O.P Iyengar

2.  M.S. Swaminathan

3.  P Maheswari

4.  K.C. Mehta

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4
Correct Answer :

K.C. Mehta


Explanation :
No Explanation available for this question

The aerial, shori and branched roots of an autotrophic plant that provide stability are known as

1.  Lateral roots

2.  Haustoria

3.  Velamen roots

4.  Clinging roots

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4
Correct Answer :

Clinging roots


Explanation :
No Explanation available for this question
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