Brown insects living in a dark background survived in a ratio of 90/120, while the same insects in a lighter background survived in a ratio of 30/120. The ratio of relative fitness of the insects in dark backgrounds to lighter backgrounds is given as

Apuppy’s tendency to chew is inherited through which of the following? a. through learned behavior b. through genes c. through seasonal cycles d. through hibernation

Why are carbon dioxide concentrations expected to increase? a carbon dioxide concentrations are expected to increase, because fossil fuel burning is expected to increase b. carbon dioxide concentrations are expected to increase, because of an increase in agriculture. c. carbon dioxide concentrations are expected to increase, because more land will have to be cleared for increasing populations and agricultural use. d. all of the above select the best answer from the choices provided mark this and return save and exit next submit submit

What characteristic makes a cell membrane selectively permeable