STD 12 - 6. evolution — NEET STD 11 Science — Question

Amniocentesis involves the analysis of

It is not characteristic of cardiac muscles.

Which one is not correct?

The pituitary gland is divided into two major parts, adenohypophysis and neurohypophysis. Which of the following characters are incorrect ?
(i) The pituitary gland is located in a bony cavity called sella tursica.
(ii) Adenohypophysis consists of two portions, pars distalis and pars intermedia while neurohypophysis consists of one portion, pars nervosa.
(iii) The pars nervosa commonly called anterior pituitary, produces LH and FSH.
(iv) Pars intermedia secretes melanocyte stimulating hormone (MSH).
(v) Pars distalis also known as posterior pituitary, stores and releases two hormones called oxytocin and vasopressin.
(vi) In humans, the pars intermedia is almost merged with pars distalis.
(vii) Hormone of posterior pituitary actually synthesised by the hypothalamus.

If mating is random, population is large and mutation does not occur; then gene frequencies of population from generation to generation remain constant. This was put forwarded by

Oxygen and carbon dioxide are transported in blood through:

Which of the following characters for echinodermata are correct ?
(i) These animals have an exoskeleton of calcareous ossicles.
(ii) All are marine with organ-system level of organisation.
(iii) Digestive system is complete with mouth on the dorsal side and anus on the ventral side.
(iv) Water canal system present which helps in locomotion, capture and transport of food and
(v) They are monoecious, fertilisation is usually external.
(vi) Development is indirect with free-swimming larva.

Assertion : Cancer cells are virtually immortal until the body in which they reside dies.

Reason : Cancer is caused by damage to genes regulating the cell division cycle.