Viviparous germination of seeds occurs in

• mango
  
  

• rhizophora
  
  

• potato
  
  

• sugarcane

The component of blood that prevents its clotting in intact blood vessels is

• antibody
  
  

• heparin
  
  

• thrombin
  
  

• haemoglobin

Islets of Langerhans are present in

• stomach
  
  

• liver
  
  

• pancrease
  
  

• heart

Enzymes are chemically

• lipid
  
  

• acid
  
  

• carbohydrate
  
  

• protein

True fruits develop from

• thalamus
  
  

• petal
  
  

• ovary
  
  

• sepal

Plant which reproduces by means of spores instead of seeds is

• coriander
  
  

• fern
  
  

• mustard
  
  

• petunia

The element, essential for synthesis of protein in plants, is

• copper
  
  

• nitrogen
  
  

• magnesium
  
  

• iron

Which one of the following is not a non-communicable disease?

• Hypertension
  
  

• Arthritis
  
  

• Rickets
  
  

• Cholera

19.

Penicillin antibiotic is obtained from

• fungi
  
  

• algae
  
  

• bacteria
  
  

• blue-green algae

The coding segment of DNA is called

• muton
  
  

• intron
  
  

• codon
  
  

• exon