What diseases is cause by cigarette smoke

What function does the limb sever in each animal? how are the limb bones of the four animals similar? based on these similarities what can be inferred about the evolution of the four animals.

Biology ! the conversion of inorganic carbon to organic carbon by plants during photosynthesis is known as _[blank]_. filtration immigration reabsorption primary production

In what month (or months) does the most precipitation fall in each of these areas? what are the driest months in each of these areas? what is the coldest month in the tropical grassland? what is the warmest month in the temperate grassland?