If the ecosystem is a closed system, which of these things does not change as it cycles through the ecosystem?

Name the types of burns one can get and which structures of the integument are damaged

How does a gymnosperm prevent itself from pollinating the same tree

Asap indicate the coat color and the proportion of offspring with that color for each of the following crosses of rabbits. assume all are homozygous. alleles: a=agouti, c=chinchilla, a=albino, a is dominant over c and a, c is dominant over a agouti x chinchilla a) 1/2 chinchilla, 1/2 agouti b) 3/4 chinchilla, 1/4 agouti c) all agouti