Which of these is a difference between a single skin cell and the skin tissue that covers an entire hand? A.
A skin cell provides protection, but skin tissue does not.
B.
A skin cell has a less complex structure than skin tissue has.
C.
A skin cell contains fluid, but skin tissue does not.
D.
A skin cell grows more than skin tissue grows.

because the light is a great source of energy for the plants to survive. (i hope this )

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".

igneous rocks are formed by solidification of cooled magma (molten rock), with or without crystallization, either below the surface as intrusive (plutonic) rocks or on the surface as extrusive (volcanic) rocks.  

the composition depends on the source magma. there are almost a thousand types of composition found till now.  

hope this