Photosynthesis is important to living organisms because it is A. The foundation of most food chains
B. The source of nitrogen gas in the air
C. How animals get carbon dioxide to breathe
D. The process that occurs in most ecosystems

Put the following processes of protein synthesis in the correct order: - dna strands unwind and separate - mrna copies dna according to complimentary base pairing - trna's anticodons bring amino acids to the corresponding mrna codons - amino acids bind to each other making a protein - mrna leaves the nucleus - a stop codon is reached, the newly formed protein is released to go do its job for the cell

In which way are mercury and venus similar? they both rotate from east to west. they are both small and rocky. they both have thick atmospheres. they both are similar to earth in structure.

There are fewer than 100 naturally occurring elements in the universe, but there are millions of different unified substances. explain how this can be true.