Nutrition in Plants

Select the mismatched pair. 

• Mycorrhiza - Saprotroph 

• Rhizobium - Symbiont 

• Nepenthes -Insectivorous plant  

• Green plants -Autotrophic  

The role of the bacteria in leguminous plants is to convert

• oxides of nitrogen into soil nitrates

• plant proteins into ammonia. 

• nitrogen gas in air into soil nitrates

• soil nitrates into gaseous nitrogen.

Amarbel (dodder) is an example of

• host

• autotroph

• parasite

• saprotroph

Identify X and Y in the given equation.  

•  X-Carbon dioxide, Y-Oxygen  

• X- Oxygen, Y-Carbon  

• X-Carbon dioxide, Y- Hydrogen

• X-Oxygen, Y- Carbon dioxide 

   

Symbiosis is the phenomenon in which two different kinds of organisms pool together their nutritional requirements. Which of the following options represents such association?  

• Fungi

• Algae

• Lichen

• None of these

Where does most of the transpiration take place in the given figure?

• P

• R

• Q

• S

 Which process causes oxygen to enter the atmosphere?

• Fat metabolism

• Respiration

• Photosynthesis

• All of these

In nepenthes plant, leaves are modified into which of the following structures?

• Leaf tendrils for mechanical support.

• Spines to reduce the loss of water

• Pitchers to trap the insects.

• Fleshy leaves to store the food and water

Which of the following statements is true about croton plants?

• Croton plants do not contain chlorophyll

• Croton plants are dark red in colour. Hence, they depend on other plants for food.

• Croton plants have chlorophyll but it is hidden by dark red colour pigments.

• Croton plants are parasites

 The saprophytes secrete digestive juices and breakdown the organic matter around them. The fungi grow tubular structures known as ___________ that branch into the dead matter and produce digestive enzymes.

• Hyphae

• Branches

• Filaments

• None of the above