Which of the followings is mainly produced by the activity of anaerobic bacteria on sewage?

• Propane

• Mustard gas

• Marsh gas

• Marsh gas

If for some reason, the vasa efferentia in the human reproductive system get blocked, the gametes will not be transported from

• epididymis to vas deferens

• ovary to uterus

• vagina to uterus

• vagina to uterus

Which of the following helps in absorption of phosphorus from the soil by plants?

• Rhizobium

• Frankia

• Anabaena

• Anabaena

Large woody vines are more epithelial cells in humans are known to occur in 

• mangroves

• tropical rainforests

• alpine forests

• alpine forests

65.

Which one of the following is the most widely accepted method of contraception in India, as at present?

• Tubectomy

• Diaphragms

• IUDs (Intra Uterine Devices)

• IUDs (Intra Uterine Devices)

A person with unknown blood group under ABO system has suffered much blood loss in an accident and needs an immediate blood transfusion. His one friend who has a valid certificate of his own blood type offers for blood donation without delay. What would have been the type of blood group of the donor friend?

• Type AB

• Type O

• Type A

• Type A

The process of RNA interference has been used in the development of plants resistant to 

• fungi

• viruses

• insects

• insects

Which one of the following conditions correctly describes the manner of determining the sex in the given samples?

• XO type of sex chromosomes determine male sex in grasshopper

• XO condition in humans as found in Turner syndrome determines female sex

• Homozygous sex chromosomes (XX) produce male in Drosophila

• Homozygous sex chromosomes (XX) produce male in Drosophila

Maximum number of existing transgenic animals is of 

• mice 

• cow

• pig

• pig

Which one of the following organisms is not an example of eukaryotic cells?

• Escherichia Coil

• Euglena Viridis

• Amoeba proteus

• Amoeba proteus