Charles darwin, after observing variability among plant and animal species in various locations, proposed an explanation for what he saw. the broad proposal included reasons that species could be modified through genetic variation, leading to measurable similarity and difference. evidence for the proposal came from biological, geographic and geological observations. his proposal allowed for prediction of new species that might be found in new settings, based on environmental conditions. darwin's proposal is an example of

Charles Darwin proposed the theory of evolution. The Darwin gave the theory of evolution after observing the variation among the different species of the animals and the plants. Darwin observed the differences, and then concluded the reason for these variations, which ultimately led him to propose the theory of evolution by natural selection. Thus, The reason proposed for the reason of variability among the species by Darwin is an example of theory.

option a and d is the correct answer

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the food storage products of chrysophytes are oils or the polysaccharide laminarin.   formerly classified as plants, the chrysophytes contain the photosynthetic pigments chlorophyll a and c all but the yellow-green algae also contain the carotenoid pigment fucoxanthin.