Which of the following pigments is associated with the germination of seeds?

• Phytochrome
  
  

• Plastocyanin
  
  

• Chlorophyll
  
  

• Xanthophyll

The tissue that connects one bone with the other is called

• adipose tissue
  
  

• cartilage
  
  

• epithelium
  
  

• ligament

Viviparous germination of seeds occurs in

• mango
  
  

• rhizophora
  
  

• potato
  
  

• sugarcane

The source of oxygen liberated as a byproduct during photosynthesis is

• carbon dioxide
  
  

• water
  
  

• glucose
  
  

• chlorophyll

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

18.

Which of the following acids is also a vitamin?

• Formic acid
  
  

• Ascorbic acid
  
  

• Maleic acid
  
  

• Palmitic acid

The SI unit of heat is

• joule
  
  

• erg
  
  

• calorie
  
  

• watt

If P, F and A represent pressure, force and area respectively, then

• $P$=$\frac{\mathbf{F}}{\mathbf{A}}$

• $P=\frac{F}{A}$

• $\mathbf{P}=\frac{\mathbf{F}}{A}$

• $P=\frac{\mathbf{F}}{A}$