Model Paper 1 — NEET STD 11 Science — Question

All of this obeys Mendel's laws except

Select the correct statement from the following.

Allergy involves

Hormones may be

The condition in which there are more than two complete set of chromosome is called

Sickle cell anaemia is

Which of the following vessel in rabbit starts with capillaries and ends in capillaries

Normal activities of the heart are regulated intrinsically, i.e., auto regulated by specialised muscles (nodal tissue), hence the heart is called myogenic. Read following statement and choose correct option for right statements ?
(i) Mass of this tissue is seen in the lower left corner of the right atrium close to the atrio-ventricular septum called the sino-atrial node (SAN).
(ii) A bundle of nodal fibres, atrioventricular bundle (AV bundle) continues from the AVN which passes through the atrio ventricular septum is known as bundle of His.
(iii) Bundle of His immediately divides into a right and left bundle which form Purkinje fibres.
(iv) The nodal musculature has the ability to generate action potentials without any external stimuli, i.e., it is autoexcitable.
(v) The SAN can generate the maximum number of action potentials, i.e., 90-95 min.
(vi) Our heart normally beats 70-75 times in a minute (average 72 beats min).

Read the following and choose the correct option with incorrect statements.
(A) Calciferous gland is present in intestine of earthworm to neutralise the humic acid present in humus.
(B) In earthworm, after 26 segment there is presence of internal median fold of ventral wall called typhlosole that increase effective area of absorption.
(C) Blood glands in earthworm are present in 4, 5 & 6 segments.
(D) The excretory organs present in earthworm is called nephridia.
(E) Integumentary nephridia forms forests of nephridia in clitellar region.
(F) There is 1 pair of heart in earthworm.
(G) There are 2 pair of testis in earthworm which are present in 11- & 12 segments.
(H) Spermathecae receive and store spermatozoa during copulation in female earthworm.
(I) Fertilisation in earthworm occur within the cocoon and development is indirect.
(J) On an average, each cocoon produces 4 baby earthworm.
(K) The scientific name of common cockroach is Periplaneta americana
(L) In each segment of cockroach, exoskeleton has hardened plates called sclerites.
(M) Ventrally, sclerite is called tergites and dorsally it is called sternites and are joined to each other by arthrodial membrane.
(N) The mouth part of cockroach is biting and chewing type.
(O) The first pair of wings arises from mesothorax and second pair from metathorax in cockroach.