The images show the wings of two different organisms. The wings of the housefly and the bat are analogous structures vestigial structures homologous structures. This indicates that their wings evolved from a common ancestor their wings have different evolutionary lineages the two species do not share any common ancestors at all.

genetic variation can be caused by mutation (which can create entirely new alleles in a population), random mating, random fertilization, and recombination between homologous chromosomes during meiosis (which reshuffles alleles within an organism's offspring).

sorry, is there a picture? i do not see any arrows.

wut? unius0123 wut?

well first you need the sample of the temperature and gas level. i couldnt write a hypothesis unless i had some data. i think temperature changes will effect volumes of gas because gas changed into a solid or liquid at specific temperatures.