. Essentials of biology presented in problems. Biology. XX. GENERAL CONSIDERATIONS FROM THE STUDY OF INSECTS Problem XXXI. How iitscctfi bcrume jviiuicrs in life's race. {Laboratory ManIIal, Prob. .I'A'.l'/.) (a.) Protective re>;cinblnnce. (b) olg£';:ivc resemblance, ic) .Mimicry, icl) Communallife. (.e) Symbiosis, (f) Parasitism. Insects are by far the most numerous of all animals. It is esti- mated that there are more species of insects than of all other species of animals upon the globe. Why should insects come to have existed in so much greater numbers than other animals? We cann
. Essentials of biology presented in problems. Biology. XX. GENERAL CONSIDERATIONS FROM THE STUDY OF INSECTS Problem XXXI. How iitscctfi bcrume jviiuicrs in life's race. {Laboratory ManIIal, Prob. .I'A'.l'/.) (a.) Protective re>;cinblnnce. (b) olg£';:ivc resemblance, ic) .Mimicry, icl) Communallife. (.e) Symbiosis, (f) Parasitism. Insects are by far the most numerous of all animals. It is esti- mated that there are more species of insects than of all other species of animals upon the globe. Why should insects come to have existed in so much greater numbers than other animals? We cannot explain this, but some light is thrown on the problem when we consider some of the ways in which insects have become winners in Ufe's race. y^^rotective Re- semblance. — When we re- member that the chief enemies of insects are birds and other ani- mals which use them as food, we can see that the insect's power of rapid flight must have been of considerable importance in escaping from enemies. But other means of pro- 249. The walking stick on a twig, showing protective Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Hunter, George William, 1873-1948. New York, Cincinnati [etc. ] American Book Company
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbiology, bookyear1911
