Large white cells that engulf and destory bacteria are known as
1) phagocytes
2) B cells
3) T cells
4) antibodies

No. 1 is the answer

Explanation: Pathogens are been destroyed by using cell membrane of phacocytes.

in 1859, charles darwin set out his theory of evolution by natural selection as an explanation for adaptation and speciation. he defined natural selection as the "principle by which each slight variation [of a trait], if useful, is preserved".

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