15. Which of the following combinations is incorrect?
(a) Nematoda - roundworms, pseudocoelomate
(b) Calcarea - gastrovascular cavity, coelom present
(c) Echinodermata - coelom present, bilateral symmetry
(d) Platyhelminthes - gastrovascular cavity, flatworms, acoelomate

Which of the following statements are true? I. Molluscs possess cellular level of organisation. II. Arthropods are true coelomates. III. Platyhelminthes are pseudocoelomates. IV. Ctenophores have bilateral symmetry. Choose the correct option.

Which one of the following statements is incorrect? (A) Mesoglea is present in between ectoderm and endoderm in Obelia (B) Asterias exhibits radial symmetry (C) Fasciola is a pseudocoelomate animal (D) Taenia is a triploblastic animal

Which one of the following is incorrect for Aves? A Heart is four-chambered and animals are oviparous B The presence of air cavities in bones and the presence of feathers on the body С Digestive tract has additional chambers and animals are homeothermal D The forelimbs are not modified into wings

Which of the following statements is correct? (a) Among the food materials such as groundnut, wheat egg and cow's milk, it is the groundnut which is the richest in protein. (b) Globular protein is present in blood, milk and eggs. (c ) Keratin is the protein in hair, hoof and nails (d) Proteins such as oxytocin, vasopressin, and insulin act as hormones

Which of the following statement is incorrect about the phylum Hemichordata ? (A) They are bilaterally symmetrical, triploblastic and coelomate animals. (B) Circulatory system is open type. (C) Excretory organ is proboscis gland (D) Fertilization is internal and development is indirect

which of the following is not common for chloroplasts and Mitochondria? (A) Both are present in all animal cells (B) Both are present in autotrophic plant cells (C) Both are present only in eukaryotes (D) Both contain DNA

Which of the following elements are present in all proteins? A. Carbon B. Hydrogen C. Oxygen D. Nitrogen

Which of the following statements is notcorrect? (A) Oxyntic cells are present in the mucosaof stomach and secrete HCI (B) Acini are present in the pancreas andsecrete carboxypeptidase (C) Brunner's glands are present in themucosa of stomach and secrete mucus (D) Goblet cells are present in the mucosaof intestine and secrete mucus

Which of the following statements is incorrect (A) Torque is the rotational analogue of force (B) Rolling motion of a cylinder down an inclined plane is combination of translational and rotational motion (C) If the effort arm is larger than the load arm, the mechanical advantage is lesser than one (D) For the extended body. centre of mass and centre of gravity do not coincide