I have an exam A- a biologist originally marked 80 butterflies in Wilson Park. Over a month long period ­ butterfly traps caught 400 butterflies. Of those 400, 40 were found to have tags. Based on this information, what is the estimated population size of the butterflies? *
40
8
800
100 ( with the method )

Iron reacts with oxygen to produce iron oxide (rust). this reaction is represented in an equation as 4fe + xo2 → 2fe2o3. identify the value of x that will balance the equation.

Which best explains why there are 64 possible codons in the genetic code and only 20 amino acids that make protiens of living organisms on earth

How are the reproductive cycles of a fungus and a pteridophyte similar? a)both organisms form fruiting bodies that produce diploid seeds. b)both organisms produce haploid spores and exhibit diploid and haploid stages. c)both organisms reproduce sexually when two haploid hyphae fuse. d)both organisms exhibit a diploid stage and are only able to reproduce asexually.