Greg walked 1.237 miles to the grocery store. then he walked 0.21 miles to the pet store before walking 1.9325 miles to his brothers house. using the rules of significant digits calculate how far greg walked.

According to theories of how life began, how did early organic molecules begin to separate from the outside world? a: specialized enzymes were required b: chains of amino acids created a barrier c: formation of microspheres or vesicles d: rna catalyzed the formation of membranes

Plant species a has a diploid number of 12. plant species b has a diploid number of 16. a new species, c, arises as an allopolyploid from a and b. the diploid number for species c would probably be a) 12. b) 14. c) 16. d) 28. e) 56.

List the four types of organic compounds found in all living things and explain why they are important.