Animals which are adaptable to a wide range of temperatures are called eurithermic animals.

Lysine, leucine, methionine, tryptophan: All are essential amino acids.

Bacteria which convert atmospheric nitrogen into compounds of nitrogen are called nitrogen fixing bacteria. Azotobactor and klebsiella are examples of free living aerobic asymbiotic nitrogen fixing bacteria.

Cochlear duct (also known as scala tympani) is one of the perilymph-filled cavities in the cochlear labyrinth of the human ear. Endolymphatic duct is found in internal ear of humans. It is a small duct connected with saccula and ending blindly in the endolymphatic sac.

Follicle stimulating hormone (FSH), luteotropic hormone (LTH), somatotropic hormone (STH): All are anterior pituitary hormones

Carl P. Swanson is known as father of modern cytology.

Gibberellin was named after the fungus gibberella fujikuroi. Gibberellin was first isolated in 1935 by Teijiro Yabuta and Sumuki, from fungal strains (gibberella fujikuroi). Gibberellic acid (GA3) was the first gibberellin to be structurally characterized.

Dicumerol is a polycyclic aromatic compound from sweet clover that is an anticoagulant analogue of vitamin K.

Organisms living at the bottom of water are called benthic animals. Lentic means still water systems (ponds and lakes) whereas lotic refers to flowing water systems (rivers and streams). Nektons are organisms that swim in the ocean and its movements are primarily controlled by currents, tides and waves.

Spleen is mesodermal in origin.

Trypsin, chymotrypsin, carboxypeptidase: All are pancreatic hormones

Osteomalacia is caused due to deficiency of vitamin D (fat soluble vitamin). Rickets is caused due to deficiency of vitamin D (fat soluble vitamin). Xerophthalmia is caused due to deficiency of vitamin A (fat soluble vitamin).

Blood vascular system is closed in annelids. Excretory system of annelids consists of coiled tubes, called nephridia.

Wrong answer. Correct matching is A - 2, B - 3, C - 4, D - 1

Skull is dicondylic in amphibians and mammals.

Ctenophores are exclusively marine animals. Ctenophores reproduce only sexually.

Both Assertion (A) and Reason (R) statements are correct, and R is correct explanation of A. In chromosomal aberration there is an alteration in the structural organisation of chromosome.  Aberrations are of two types, Intrachromosomal aberration :  when the alteration is within single chromosome. Interchromosomal aberration : when alteration involves the intervention of two or more chromosomes. Cri-du-chat syndrome in humans is caused by deletion of a part of short arm of chromosome 5. It involves alteration in only one chromosome; hence it is an intrachromosomal aberration.

Breathing and respiration are not synonymous. Breathing is first step of respiration which refers to the intake of fresh air inside and removal of foul air outside the respiratory organs. Respiration is a biochemical process by which organic compounds in food are oxidized to carbon dioxide, water and energy in a stepwise process. Breathing is physical process.

Correct answer. Etiology is the study of cause or origination of disease. Oncology is a branch of science that deals with tumors and cancers. Nosology is the branch of medicine that deals with the classification of diseases. Traumatology is the study of wounds and injuries and the surgical therapy and repair of the damage.

4 - chambered heart (2 auricles + 2 ventricles) is a characteristic feature of aves and mammals.

Organisms of phylum coelentrata exhibit tissue level of body organisation. Comb jellies (organisms of phylum ctenophora) have tissue level of body organisation.

Emphysema is due to the inflation or abnormal distension of the bronchioles or alveolar sacs resulting in loss of their elasticity.

Correct answer. Apis indica is the scientific name of honey bee. Pavo cristatus is the scientific name of peacock. Musa domestica is the scientific name of house fly. Funambulus palmarum is the scientific name of indian palm squirrel (also known as three-striped palm squirrel).

Neries and pheretima belong to phylum annelida.

Kidneys are mesonephric in cartilaginous fishes. Heart is 2-chambered in cartilaginous fishes.

Kidneys are metanephric in organisms, belonging to class reptilia and aves.

Correct answer. Coelomates have a fluid filled body cavity called coelom with a complete lining called peritoneum derived from mesoderm, e.g., annelids, molluscs, arthropods, echinoderms, hemichordates, and charodates. Pseudocoelomates have a pseudocoelom which is a fully functional body cavity where tissue derived from mesoderm only partly lines the fluid filled body cavity, e.g. aschelminthes. Acoelomates have no body cavity at all, e.g., platyhelminthes.

Correct answer. After fertilization ovary develops into fruit. After fertilization, the ovule develops into a seed. After fertilization, the funicle (stalk of ovule) forms the stalk of seed. After fertilization, the nucellus may develop into the perisperm that feeds the embryo.