B as the scion, and generating a generation Y by using the generation C as the stock and the generation D as the scion; and generating a generation W by using the generation X as the stock and the generation Y as the scion, thus obtaining the poplar seeds with color-variable leaves. ...
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根据“They protect themselves with different colors so that they will not be seen by predators easily.”可知,动物用不同的颜色保护自己,由此可推知predators指的是“以某种动物为食的动物”,B选项“杀死其他动物以获取食物的动物。”符合语境,故选B。 (4)题详解: 篇章结构题。根据整个文章的理解可知,第...
The natural world is colorful with human plants and animals showing different colors.Human skin can be many different colors and it changes with the sun, our feelings or our health for example. This is because of pigments色素) which reflect light and make what the eye sees as colors. So wh...
With their deer-resistant leaves and pretty purple or pink flowers, the dwarf varieties of Astilbes (Astilbe chinensis) are perfect ground covers for your shade garden. Astilbe's fern-like leaves and delicate blooms add interest to any shady spot. Different Astilbe varieties will grow in a vari...
Leaves that are red, purple or brown are filled with large amounts of anthocyanins. This is the same group of pigments that color deciduous leaves in...Become a member and unlock all Study Answers Start today. Try it now Create an account Ask a question Our experts can answer ...
The days are much shorter, and water is hard to get. Plants have found many different ways to get through the harsh days of winter. Table of Contents Why Do Leaves Change Color? Photosynthesis Autumn Preparations for Winter Learn More: Surviving Winter ...
B① The natural world is colorful with humans, plants and animals showing different colors. Human skin can be many different colors and it changes with the sun, our feelings, or our health. This is because of pigments(色素), which reflect light and make what the eye sees as color. So,...
Animals also use colors for their own need.They protect themselves with different colors in order not to be seen by predators.The snowshoe hare,for example,a type of wild rabbit,changes colors with seasons for this reason.During summer it is a brown color,and in winter it is white so that...
1)color-leafed plants彩叶植物 1.Studies on contents of pigments in the leaves of several color-leafed plants;不同彩叶植物叶片中叶绿体色素含量研究 2.This paper introduces the classification method,color classification of color-leafed plants.彩叶植物为生长季节或生长季节的某些阶段全部或部分叶片呈现非绿色...