The cost of running a large greenhouse is partially affected by the levels of light and temperature of plants are provided with plenty of carbon dioxide the grower can get two Crops a year at 20°c and three crops a year at 30°C in their greenhouses. explain why majy growers use 20°c rather than 30°c in their greenhouses in your explanation suggest why many growers are also investigating in insulation systems that can be added and removed electronically

The upper forelimbs of humans and bats have fairly similar skeletal structures, whereas the correspondingbones in whales have very different shapes and proportions. however, genetic data suggest that all three kindsof organisms diverged from a common ancestor at about the same time. which of the following is the mostlikely explanation for these data? a) humans and bats evolved by natural selection, and whales evolved by lamarckian mechanisms.b) forelimb evolution was adaptive in people and bats, but not in whales.c) natural selection in an aquatic environment resulted in significant changes to whale forelimb anatomy.d) genes mutate faster in whales than in humans or bats.e) whales are not properly classified as mammals.