STD 12 - 1. sexual reproduction in flowering plants — NEET STD 11 Science — Question

Dikaryon formation is the characteristic feature of

Spores of Funaria gives rise to

Which hormone causes stunted growth in pea

Given below are two statements :
Statement I :
The use of drugs and alchohol damages nervous system and liver.
Statement II :
The use of drugs and alchohol during pregnancy is also known to adversely affect the foetus.
Choose the correct answer from the options given below

The below diagram shows.

Which of the following does not require carrier molecules during transport through cell membranes

From the following identify lateral meristem.

If the mean and the median pertaining to a certain character of a population are of the same value, the following is most likely to occur

Choose correct statement for cytokine and mark correct option :
(i) It is a simple gaseous PGR.
(ii) It synthesised in large amounts by tissues undergoing senescence and ripening fruits.
(iii) Influences of it on plants include horizontal growth of seedlings, swelling of the axis and apical hook formation in dicot seedlings.
(iv) It promotes senescence and abscission of plant organs especially of leaves and flowers.
(v) It synthesised in regions where rapid cell division occurs, for example, root apices, developing shoot buds, young fruits, etc.
(vi) It helps to produce new leaves, chloroplasts in leaves, lateral shoot growth and adventitious shoot formation.
(vii) It help overcome the apical dominance.
(viii) They promote nutrient mobilisation which helps in the delay of leaf senescence.

Double fertilization is fusion of