STD 12 - 7. human health and disease — NEET STD 11 Science — Question

Which one of the following statements are incorrect ?
(A) Cnidarians exhibit two basic body forms called medusa (sessile and cylindrical form) and polyp (free-swimming and umbrella shaped).
(B) The phenomenon exhibited by some Cinidarians in which both forms exhibit alternation of generation is termed as metastasis.
(C) Polyps produce medusae by sexually and meduase forms polyp by asexually reproduction.
(D) Physalia is known as Portuguese man-of-war; Adamsia as Sea anemone; Pennatula as Sea pen; Gorgonia as Sea fan and Meandrina as Brain coral.
(E) Ctenophores are commonly known as seawalnuts or comb jellies.
(F) Ctenophores are exclusively marine and body bears eight external rows of ciliated comb plates that help in locomotion.
(G) Bioluminescence is the property of living organism to emit light and is well marked by ctenophores.
(H) Reproduction in ctenophore takes place by sexual means. Fertilisation is external with indirect development.
(I) Hooks and Sucker are present in parasitic form of members of Aschelminthes.
(J) Specialized cells called flame cells help in osmoregulation and excretion in platyhelminthes.
(K) In platyhelminthes, fertilization is internal with direct development.
(L) Some members of platyhelminthes like planaria possess high regeneration capacity.
(M) Taenia, a member of phylum platyhelminthes is commonly called tapeworm and fasciola is commonly called as liver fluke.
(N) The alimentary canal in members of aschelminthes is complete with a well- developed muscular pharynx.
(0) The males are longer than females in members of aschelminthes.
(P) The members of aschelminthes are dioecious as sexes are separate. Fertilisation is internal and development is indirect.
(Q) Ascaris, a member of phylum aschelminthes are commonly known as round worms; Wuchereria as filarial worm and Ancyclostoma as hookworms.
Choose the correct option given below :-

Proboscis gland is a/an

Leydig's cells secrete

The maximum volume of air a person can breathe in after a forced expiration is known as

Earliest reptiles evolved in the period

Select the correct statement for outbreeding devices
A. In some species, pollen release and stigma receptivity are not synchronised.
B. In some species, the anther and stigma are placed at different positions so that the pollen can not come in contact with the stigma of the same flower.
C. Continued cross-pollination result in inbreeding depression.
D. In dioecious plant only autogamy prevents.

Immune response of old age person becomes weak due to the degeneration of ...... Gland

Which of the following statements are correct for transport of carbon dioxide ?
(i) Nearly 20-25 per cent of CO₂ is transported by RBCs as carbamino-haemoglobin.
(ii) 70 percent CO₂ is carried as bicarbonate.
(iii) About 7 per cent of CO₂ is carried in a dissolved state through plasma.
(iv) Binding of carbon dioxide with haemoglobin is related to the partial pressure of CO₂
(v) pO₂ is a major factor which could affect binding of carbon dioxide with haemoglobin.
(vi) When pCO₂ is low and pO₂ is high as in the tissues, more binding of carbon dioxide occurs whereas.
(vii) When the pCO₂ is high and pO₂ is low as in the alveoli, dissociation of CO₂ from carbamino- haemoglobin takes place.
(viii) Every 100 ml of deoxygenated blood delivers approximately 4 ml of CO₂ to the alveoli.

Which one is mismatched?