All organisms respond to changes in their environments and such changes act as stimuli. A response is significant in improving an organism’s chance of survival. Plants respond to the following external stimuli to enhance survival and improve their chances of successful breeding. Prompt: Tropism is a directional growth response. States the differences between phototropism, gravitropism, hydrotropism, and thigmotropism.

Punnett squares are used to show possible combinations of alleles or to predict the probability of a trait occurring in offspring. an incomplete dominance cross is performed between a bird that is homozygous for red feathers and a bird that is homozygous for blue feathers. purple offspring result. then, two of the purple offspring are crossed. according to the punnett square for this cross, how many of the offspring from the second cross will have a feather color that results from incomplete dominance? 1 in 4 2 in 4 3 in 4 4 in 4