Two in a corner, one in a room, zero in a house, but one in a shelter. What am I?

Spelt forwards I’m what you do every day, spelled backwards I’m something you hate. What am I?

I am 5 letters long.
My first two tell you who I am
My first 3 could be a medicine
My last three reversed could be a young boy.
My 4th, 3rd and 2nd in that order could be a fruit drink.
If you have me you may hang me round your neck
WHAT AM I ?

Take one out and scratch my head, I am now black but once was red. What am I?

There was a greenhouse.
Inside the greenhouse, there is a white house.
Inside the white house, there is a red house.
Inside the red house, there are lots of babies.

What is It?

As a whole I am both
safe and secure.

Behead me and I become
a place of meeting.

Behead me again and I am
the partner of ready.

Restore me, and I become
the domain of beasts.

What am I?

No matter how little or how much you use me, you change me every month. What am I?

You see me once in June, twice in November, and not at all in May. What am I?

Until it is measured, not known. Yet how you miss it when it has gone. What is it?

I welcome the day with a show of light, I stealthily came here in the night. I bathe the earthy stuff at dawn, But by noon, alas! I'm gone.