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408. Особенности морфологии половозрелых форм Ancylostoma duodenale:a) у самцов на заднем конце тела имеется колоколовидная копулятивная сумка;b) ротовое отверстие окружено везикулой;c) наличие непарной половой трубки у самок; d) головной конец нитевидно вытянут.

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In an experiment, 100 mice were released into a field to which no other mice had access. Immediately after their release, a representative sample of mice was captured, their fur color was recorded, and they were returned to the field. After twenty years, a representative sample of mice was captured and the distribution of fur color was again recorded.Which of the following could best explain the change in fur color distribution, as shown in the table above?
Which of the following is probably the best explanation for the fact that Antarctic penguins cannot fly, although there is evidence that millions of years ago their ancestors could do so?APenguins live on land and feed in the water; therefore they have no need to fly.BThe Antarctic home of penguins is flat and barren; therefore there is no place to fly.CAncestral penguins without large wings were better able to swim and feed in the water; therefore they passed their genes for shorter wing structure on to their offspring.DAncestral penguins did not use their wings for long periods of time; therefore today’s penguins have only tiny, nonfunctional wings.EThe cold and wind of Antarctica make flight impossible; therefore penguins that live there have lost the ability to fly.
Within a forest ecosystem, there is a large amount of diversity among members of a warbler species. Of the following stages of meiosis illustrated for a typical cell, which contributes most to diversity among the warblers?AChromosomes apartBChromatids apartCChromosomes crossing overD2 chromosomes on opposite sides of the cell

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