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

Insects have blood which

Random genetic drift in a population probably results from

DNA replication is semi-conservative in nature was experimentally proved in eukaryotes by:

Genes which code for a pair of contrasting traits are known as ........

Multipolar neurons are found in the

In which of the following the placenta forms an important structure in development

If dwarf pea plant was treated with Gibberellic acid, it grew as tall as the pure tall pea plant. If this treated plant is crossed with a pure tall plant then the phenotypic ratio of is likely to be

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.

Somatostatin is secreted by