Complete the sentences to describe the different levels of organization in organisms. A(n) is a group of organs that work together to perform a common function. A(n) is a group of tissues that work together to perform a common function. A(n) is a basic unit of structure and function of all living things. A(n) is a group of cells that work together to perform a common function.

What were the main components of earth’s earliest atmosphere? oxygen and ammonia hydrogen and helium oxygen and nitrogen hydrogen and nitrogen

How does human environment effect the biosphere

14) whenever diploid populations are in hardy-weinberg equilibrium at a particular locus a) the allele's frequency should not change from one generation to the next, but its representation in homozygous and heterozygous genotypes may change. b) natural selection, gene flow, and genetic drift are acting equally to change an allele's frequency. c) this means that, at this locus, two alleles are present in equal proportions. d) the population itself is not evolving, but individuals within the population may be evolving.