Assertion : Pharyngeal nephridia play a role in the conservation of water in the earthworm.
Reason : They help the earthworm in keeping the skin moist for cutaneous respiration.
If both assertion and reason are true and reason is the correct explanation of assertion
If both assertion and reason are true but reason is not the correct explanation of assertion.
If assertion is true but reason is false.
If both assertion and reason are false.
C.
If assertion is true but reason is false.
Pharyngeal nephridia occur in three pairs of bunches in the 4th, 5th and 6th segments lying on each side ofthe alimentary canal. The ducts ofthe nephridia of the 6th open into the buccal cavity while the ducts from the nephridia bunches of the 4th and 5th segments open into the pharynx. These ducts carry excretory products from the pharyngeal nephridia into the gut.
Enteronephric condition is an adaptation for the conservation of water which is absorbed by the inner lining of the alimentary canal. Ectonephric nephridia discharge their contents directly to the outside which help the earthworm in keeping the skin moist for cutaneous respiration only. Integumentary nephridia are ectonephric nephridia while, pharyngeal and septal nephridia are enteronephric.
Which of the following is correct regarding genetic code?
UUU is the initiation codon which also codes for phenylalanine.
There are 64 triplet codons and only 20 amino acids
Three random nitrogen bases specify the placement of one amino acid
UAA is the nonsense codon which also codes for methionine
Assertion : Pantothenic acid deficiency is probably the most common vitamin deficiency.
Reason : Macrocytic anaemia is a characteristic feature of pantothenic acid deficiency.
If both assertion and reason are true and reason is the correct explanation of assertion
If both assertion and reason are true but reason is not the correct explanation of assertion.
If assertion is true but reason is false.
If both assertion and reason are false
Which of the following disorders are caused due to recessive autosomal mutations?
Turner"s syndrome and sickle cell anaemia
Edward's syndrome and Down's syndrome
Cystic fibrosis and phenylketonuria
Alzheimer's disease and Huntington's chorea
Assertion : Insulin is antagonistic to glucagon.
Reason : It is an anabolic hormone.
If both assertion and reason are true and reason is the correct explanation of assertion.
If both assertion and reason are true but reason is not the correct explanation of assertion.
If assertion is true but reason is false.
If both assertion and reason are false.
Assertion : Auditory ossicles are small bones present in the cavity of inner ear.
Reason : Auditory ossicles maintain the balance of air pressure between two sides of ear drum.
If both assertion and reason are true and reason is the correct explanation of assertion.
If both assertion and reason are true but reason is not the correct explanation of assertion.
If assertion is true but reason is false
If both assertion and reason are false.
Which one is correct?
Salmonella typhi and Haemophilus influenzae cause pneumonia
Widal test is done for malaria
Entamoeba histolytica causes amoebiasis
Wuchereria causes enterobiasis
