How does a plant lose water in the night

transpiration

Explanation:

by transpirational water loss is a consequence of allowing respiratory CO2 to escape at sufficiently high rates through stomata.

answer: - b cells

explanation: -

so, the b cells mediate their action by identifying the antigens present on the surface of the pathogens and then producing antibodies in return to mediate its effect.

hydrogen is a compound or a single element and a element is a pure substence that cannot be separated into simpler subtances

clorine is a compound its a chemical substance that forms when two or more different elements combine

so both hydrogen and clorine are compounds