STD 12 - 4. principal of inheritance and variation — NEET STD 11 Science — Question

A cross between a homozygous recessive and a heterozygous plant is called

The secondary spermatocytes undergo the second meiotic division to produce four equal,

Homologous organs are

The success of birth control programmes in controlling population growth is dependent on

Who secrets Sebum?

Fill in the blanks.
(i) Cancer causing agents are called A and cancer causing viruses are called B which have genes called C.
(ii) D or E genes present in normal cells when activated under certain conditions lead to oncogenic transformation of cells.
(iii) In treatment of cancer, patients are given substances called biological response modifier such as F which activates their immune system & helps in destroying tumor.
(iv) Heroin commonly called G is chemically H which is obtained from morphine by I reaction and is extracted from latex of poppy plant J (Scientific name).
(v) Cannabinoids are obtained from the infloroscence of the plant K. They are known for their effects on L system of body.
(vi) Cocaine is obtanied from coca plant M native to N. It interferes with transport of neuro- transmitter O.
(vii) Morphine is very effective P and Q and is very useful in patients who have undergone surgery.
(viii) R is a chemical substance in tobacco that stimulates adrenal gland to release adrenaline and nor-adrenaline into blood.
(ix) Adolescence means both S and T during which a child becomes mature. The period between U and V years of age is adolescence period.
(x) Dependence is the tendency of the body to manifest a characteristic and unpleasant W syndrome.
(xi) Excessive doses of drugs may lead to coma and death due to respiratory failure, heart failure or X.
(xii) The chronic use of drugs and alcohol damages nervous system and Y.
(xiii) The damage to liver due to excessive use of drugs and alcohol is called Z.
choose the correct option given below :-

Choose the correct statement

Man in the life cycle of Plasmodium is