A woman with two genes (one on each X-chromosome) for haemophilia and one gene for colour blindness on the X-chromosome marries a normal man. How will the progeny be?

• All sons and daughters are haemophilic and colourblind

• Haemophilic and colourblind daughters

• 50% haemophilic colourblind sons and 50% haemophilic sons

• 50% haemophilic daughters and 50% colourblind daughters

The middle piece of the sperm contains

• Proteins

• Centriole

• Nucleus

• Mitochondria

Which of the following is mismatched?

• Vitamin K- Beriberi

• Vitamin D-Rickets

• Vitamin C - Scurvy

• Vitamin A-Xerophthalmia

Total number of bones in the hindlimb of a man is

• 14

• 21

• 24

• 30

The diversity in the type of beaks of finches adapted to different feeding habits on the Galapagos islands, as observed by Darwin, provides evidence for

• Origin of species by natural selection

• Intraspecific Variations

• Intraspecific competition

• Interspecific competition

Secondary body cavity with segmented mesodermal lining is called

• Haemocoel

• Neurocoel

• True Coelom

• Pseudocoelom

The term 'aquaculture means

• Aspergillosis

• Inland fisheries

• Marine fisheries

• Both (b) and (c)

Which important green-house gas, other than carbon dioxide, is being produced from the agricultural fields?

• Arsine

• Sulphur dioxide

• Ammonia

• Nitrous oxide

Active immunity means

• Resistance developed after disease

• Increasing quantity of blood

• Resistance developed before the disease

• Increasing rate of heart beat

The most important component of the oral contraceptive pills is

• Progesterone

• Growth hormone

• Thyroxine

• Luteinising hormone