By Э. Боума, Т.Б. Клементьева
Книга Animals. Животные Animals. Животные Книги Иностранные языки Автор: Э. Боума, Т.Б. Клементьева Год издания: 2008 Формат: pdf Издат.:Аст-пресс школа Страниц: 48+17 Размер: eighty five Язык: Английский0 (голосов: zero) Оценка:Новый игровой курс английского языка "Животные" знакомит детей с разнообразным миром животных, учит называть по-английски обитателей фермы; зверей, птиц, насекомых леса, зоопарка; морских обитателей, а также ребята запомнят множество новых глаголов и прилагательных. Песни, стихи, подвижные и пальчиковые игры, весёлые задания делают процесс изучения увлекательным. Вкомплекте: книгаученика и рабочая тетрадь. Для детей дошкольного и младшего школьного возраста (4-7 лет).
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Extra resources for Animals. Животные
Reciprocal coordination occurred not only between flight and settling responses, but between different kinds of flight behavior; an example is illustrated in Figure 2-1C. During cruising migratory flight, in which the aphid oriented toward the overhead light source, a leaf-shaped yellow card was presented to one side of the flying aphid. This card induced a "targeted" flight, differing from cruising in that it involved a horizontally directed approach to the presented object that included a depressed rate of climb.
Similarly, Aphis fabae is sensitive to blue light from the sky on takeoff, but becomes sensitive to yellow light reflected from the immature leaves of host plants at the termination of a migratory flight (Kennedy etal. 1961). Fifth, migrants reallocate energy specifically to support movement. Thus birds may double their body weight in subcutaneous fat, insects vastly increase the size of the fat body, and plants allocate fat to the embryo in a departing seed (Chapter Migration: A Definition • 25 6).
They then spend several stadia in the plankton, but at the time of molt to the settling postlarva, they again become thigmotactic and descend to the substrate seeking shelter in cavities or interstices. Stomatopods are not unique in these behaviors. A survey of 141 species of marine invertebrates with planktonic larvae found that the juveniles of 82% of the species displayed photopositive behavior when entering their pelagic phases and later photonegativity when settling to the substrate (Thorsen 1964).