STD 11 - 16. Excretory product and their elimination — NEET STD 11 Science — Question

Ovum is

Read the following
(i) Grasshopper is an example of XO type of sex determination in which males have only X- chromosome besides autosomes, whereas female have a pair of X-chromosome.
(ii) In mammals including man, XY type of sex determination is seen where both male and female have same number of chromosome.
(iii) The XO and XY sex determination mechanism are designated to be example of female heterogamety whereas ZW sex determination mechanism are designated to be example of male heterogamety.
(iv) In birds the female have zw chromosome whereas males have zz chromosome besides autosomes.
(v) The mutation arising due to change in a single base of DNA is known as point mutation.
(vi) The chemical and physical factors that induce mutation are reffered to as mutagens.
(vii) An analysis of traits in a several generation of a family is called pedigree analysis.
(viii) In pedigree analysis the symbol represents affected individuals and the symbol represents consanguineous mating.
(ix) Sickle-cell anaemia and phenylketonuria are example of X-linked recessive trait.
(x) Myotonic dystrophy is example of autosomal recessive trait.
(xi) Haemophilia is sex-linked recessive disease in which heterozygous female may transmit the diseases to sons.
choose the option with incorrect statements :-

Physical and mental dependency over any specific drug is known as

There is a continuous increase in the growth rate (population) of the world. It is due to

Which one of the following items gives its correct total number ?

A survey of animal kingdom presents a variety of excretory structures. In most of the invertebrates, these structures are simple tubular forms whereas vertebrates have complex tubular organs called kidneys. Some of these structures are mentioned here.
(i) Protonephridia or flame cells are the excretory structures in Platyhelminthes.
(ii) Planaria and amphioxus have protonephridia is a excretory structures.
(iii) Nephridia are the tubular excretory structures of earthworms and other annelids.
(iv) Nephridia help to remove nitrogenous wastes and maintain a fluid and ionic balance.
(v) Malpighian tubules are the excretory structures of most of the insects and molluscs including cockroaches.
(vi) Antennal glands or green glands perform the excretory function crustaceans like prawns.
Which of the following statements are correct ?

The velocity of blood flow is minimum in

Glycogen is converted into glucose by

Birds and mammals have