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

Growth is maximum in the zone of

Read the following statements :
(i) All events-from pollen deposition on the stigma until pollen tubes enter the ovule-are together referred to as pollen-pistil interaction.
(ii) Pollen-pistil interaction is a dynamic process involving pollen recognition followed by promotion or inhibition of the pollen.
(iii) Artificial hybridisation is achieved by emasculation and bagging techniques.
(iv) Removal of anthers from the flower bud before the anther dehisces referred to as bagging.
(v) Since two types of fusions, syngamy and triple fusion take place in an embryo sac the phenomenon is termed double fertilisation.
Of above statements which one is correct ?

Classification based on chromosome number is

How many bacteria are produced in four hours if a bacterium divides once in half an hour

Which of the following statements is incorrect?

There are given some plants below, select among the options that, to how many families they belong? Plants are - Crotolaria, Atropa, Solanum, Arachis, Bambusa and Chrysanthemum

Standing state of the ecosystem is