Using Fick's law explain how insects are adapted for gas exchange

rate of diffusion=surface area X differecnce in concentration / length of diffusion pathway

Biodiversity, Biogeography, and Characteristics of Insects

Hi, There are actually 3 questions here, but they relate to the same thing. I need information - please provide answers that briefly summarize the most important pieces of information pertaining to the questions. Thanks for your help! 1) What characterizes the arthropoda? The insecta? The arachnida? The unirama? 2) LIST and briefly discuss 9 characteristics of the phylum arthropoda. 3) Choose an order of insects and discuss its biodiversity (species richness and evenness) and biogeography. Thanks again!

Number of insects and their biodiversity

Hi, Please have a background in biology to answer this question. It is an easy question, but I really need it to have an excellent answer. Please do not simply cut and paste an answer from the internet, unless it actually answers the question. Approximately how many species of insects are there? Please briefly summarize the main reasons of this high biodiversity. Thanks!

Circulatory System

In order for an insect to grow as large as an elephant, which changes or modification would need to be made in the circulatory systems of insects? a) the heart would need to have multiple chambers b) the circulating body fluid would need to be contained in closed vessels c) the heart would need to have multiple ostia d) only A and B are correct e) A, B, and C are correct

Recombinant Mapping

If Curly wings are recessive to normal wings and Barred Eyes is recessive to normal eyes, cross Curly Barred to a normal normal fly. What would be the expected ratios if they were linked or unlinked? If you had 2,500 flies, how many would you expect to see?