Name the following:

Permanently open structures seen on the bark of an old woody stem.

Q. $.........$ are the opening in the bark of woody stem.

Q. Give the biological technical terms for the following.
(i) Chemical found in the blood which act against antigens
(ii) A constituent that causes pollution
(iii) The onset of menstruation in a young girl
(iv) Structure which connects the placenta with the foetus
(v) The fluid present between the layers of meninges
(vi) Permanently open structures seen on the bark of an old woody stem
(vii) The biological process which is the starting point of the food chain
(viii) The change in an organism resulting due to stimulus
(ix) An Antiseptic substance present in tears
(x) A solution in which the relative concentration of water molecules and the solute on either side of the cell membrane is the same

Q. Bark is the outermost woody layers of stems found in _______.

Q. The small aerating pores seen on cork layer of woody stem are

Q. Between the bark and the wood in a woody stem, there is a layer of meristem called: