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  • Help me solve this Read the following four statements (A-D) :(A)Both, photophosphorylation and oxidative phosphorylation involve uphill transport of protons across the membrane.(B)In dicot stems, a new cambium originates from cells of pericycle at th

Read the following four statements (A-D) :

(A)    Both, photophosphorylation and oxidative phosphorylation involve uphill transport of protons across the membrane.

(B)    In dicot stems, a new cambium originates from cells of pericycle at the time of secondary growth.

(C)    Stamens in flowers of Gloriosa and Petunia are polyandrous.

(D)    Symbiotic nitrogen-fixers occur in free - living state also in soil.

How many of the above statements are right?

  • Option 1)

    Three

  • Option 2)

    Four

  • Option 3)

    One

  • Option 4)

    Two

 

Answers (1)

 

Symbotic nitrogen fixing bacteria -

1. Rhizobium - associated with roots of legume plants

2. Azolla (water fern) - associated with Anabaena azollae

3. Coralloid roots of Cycas -associated with Anabaena and Nostoc

-

 

 Symbiotic nitrogen fixing bacteria occurs in free living state in association with another organisms(Anaboena,Nostoc, etc). Also in dicot stems , some medullary rays cells become interfascicular cambium.  

 


Option 1)

Three

Incorrect option

Option 2)

Four

Incorrect option

Option 3)

One

Incorrect option

Option 4)

Two

Correct option

Posted by

Sabhrant Ambastha

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