Poliomyelitis, often called polio or infantile paralysis, is an acute, viral, infectious disease spread from person to person, primarily via the fecal-oral route. The term derives from the Greek polios, meaning “grey”, myelos, referring to the grey matter of the spinal cord, and the suffix its which denotes inflammation., i.e., inflammation of the spinal cord’s grey matter, although a severe infection can extend into the brain stem and even higher structures, resulting in polio encephalitis, producing apnea that requires mechanical assistance such as an iron lung.

Correct Option: A

Poliomyelitis, often called polio or infantile paralysis, is an acute, viral, infectious disease spread from person to person, primarily via the fecal-oral route. The term derives from the Greek polios, meaning “grey”, myelos, referring to the grey matter of the spinal cord, and the suffix its which denotes inflammation., i.e., inflammation of the spinal cord’s grey matter, although a severe infection can extend into the brain stem and even higher structures, resulting in polio encephalitis, producing apnea that requires mechanical assistance such as an iron lung.

A heterozygous woman with type A blood and a heterozygous man with type B blood have, as you figured with your Punnet square, a 25% chance with each child that the child will have blood group O, 25% chance for blood group A, 25% chance for blood group B, and 25% chance for blood group AB. The same is true for the reciprocal cross: a heterozygous woman with type B blood and a heterozygous man with type A blood. In such a family, the existence of a child with blood group O is evidence that both parents are heterozygous.

Correct Option: C

A heterozygous woman with type A blood and a heterozygous man with type B blood have, as you figured with your Punnet square, a 25% chance with each child that the child will have blood group O, 25% chance for blood group A, 25% chance for blood group B, and 25% chance for blood group AB. The same is true for the reciprocal cross: a heterozygous woman with type B blood and a heterozygous man with type A blood. In such a family, the existence of a child with blood group O is evidence that both parents are heterozygous.

Sponges are animals of the phylum Porifera. They are multicellular organisms which have bodies full of pores and channels allowing water to circulate through them, consisting of jelly-like mesohyl sandwiched between two thin layers of cells. Sponges have unspecialized cells that can transform into other types and which often migrate between the main cell layers and the mesohyl in the process. Sponges do not have nervous, digestive or circulatory systems.

Correct Option: D

Sponges are animals of the phylum Porifera. They are multicellular organisms which have bodies full of pores and channels allowing water to circulate through them, consisting of jelly-like mesohyl sandwiched between two thin layers of cells. Sponges have unspecialized cells that can transform into other types and which often migrate between the main cell layers and the mesohyl in the process. Sponges do not have nervous, digestive or circulatory systems.

A clone is obtained by vegetative propagation of a single plant and it propagates vegetatively in successive generation. It offers excitation for exploiting desirable mutations. It maintains purity of race in heterozygous state. The clones retains their original characteristics after many years of vegetative propagation i.e. they are stable

Correct Option: A

A clone is obtained by vegetative propagation of a single plant and it propagates vegetatively in successive generation. It offers excitation for exploiting desirable mutations. It maintains purity of race in heterozygous state. The clones retains their original characteristics after many years of vegetative propagation i.e. they are stable

Cheetahs have been known to exist in India for a very long time, but as a result of hunting and other causes, cheetahs have been extinct in India since the 1940 s.The cheetah is the only animal that has been described extinct in India in the last 100 years.

Correct Option: B

Cheetahs have been known to exist in India for a very long time, but as a result of hunting and other causes, cheetahs have been extinct in India since the 1940 s.The cheetah is the only animal that has been described extinct in India in the last 100 years.