Name the interaction Cuckoo lays her egg in the crow's nest

Students involved in nature club activity found some inter specific interactions between organisms in a garden pea. They made table of interaction giving + for beneficial - for detrimental and 0 for neutral interactions. Name the type of interaction between these organisms.

After delivery milk ejection starts in human females.It is due to the hormonal interaction. Name the hormones involved in this process.

In electrostatics, Electric charge is a feature of par ticles like protons, electrons etc. that decides the force of interaction among them. Br Write the name of the law that is used to measure the above force of interaction.

Raman is learning the post fertilization changes of an angiosperm embryo sac with the help of slides. He identified the egg nucleus and polar nuclei in the central cell with the help of his teacher. Name the other nuclei present in the embryo sac.