Crocodile and penguin are similar to whale and dogfish in which one of the following features?

• possess a solid single -stranded central nervous system

• lay eggs and guard them till they hatch

• possess a bony skeleton

• possess a bony skeleton

ABO blood grouping is controlled by gene I, which has three alleles and show codominance, There are six genotypes. How  many phenotypes in all are possible.?

• Six

• Three

• Four

• Four

Three of the following statements about enzymes are correct and one is wrong. which one is wrong?

• Enymes require optimum pH for maximal activity

• Enzymes are denatured at high temperature but in certain exceptional organisms they are effective even at temperatures 80^o-90^o C

• Enzymes are highly specific

• Enzymes are highly specific

An elaborate network of filamentous proteinaceous structures present in the cytoplasm which helps in the maintenance of cell shape is called

• thylakoid

• endoplasmic reticulum

• plasmalemma

• plasmalemma

Jaundice is a disorder of 

• excretory system

• skin and eyes

• digestive system

• digestive system

Kranz anatomy is one of the characteristics of the leaves of 

• potato

• wheat

• sugarcane

• sugarcane

Which one o0f the following is monoecious?

• Marchantia

• Cycas

• Pinus

• Pinus

Transport of food material in higher plants takes place through

• companion cells

• transfusion tissue

• tracheids

• tracheids

Root development is promoted by

• abscisic acid

• auxin

• gibberellin

• gibberellin

Black (stem) rust of wheat is caused by

• Alternaria solani

• Ustilago nuda

• Puccinia graminis

• Puccinia graminis