Answer:
Worker bees are sterile although they are female because their ovary is not activated that means they cannot lay eggs like Queen bee. When Queen bee come closer to Worker bees,the worker bees egg producing gene subside, so no eggs are produced.When eggs are not produced , no fertilization takes places, so they are non- fertile or sterile.
Hope this helps...
An estuary is a place where seawater and freshwater mix.
Your tap water is treated water from which organisms and excess ions have been removed.
That rain-washed all sorts of particles and chemicals into the ocean.
After a few million years, it evened out and the amount of things coming into the ocean equaled the amount leaving.
It's a term called equilibrium.
The virus attaches to the host cells membrane