Fronstin1*, Stephanie M. Doucet2 and Julian K. Christians1 Abstract Background: One hypothesis to explain the blue–green colour of the eggs of many bird species is that it is a sexually-selected signal of the laying female's quality, which males use to determine ...
In the pied flycatcher Ficedula hypoleuca , the intensity of the eggshell's blue-green ground-colour (pigment biliverdin) is related to the female's health (immunocompetence) at laying. We studied the effect of the insecticide DDT (notorious for reducing eggshell thickness in raptors by ...
The striking diversity of avian eggshell colour has long fascinated biologists. Recently, it has been proposed that the blue-green colour of some eggs may
B _根据第二段中的"The colour of a hen's earlobes is actually the best indicator of what colour its eggs will be. "可知,鸡蛋 颜色的主要判断依据是母鸡的耳垂。 故选B 2. D 根第 "White Leghorn chickens-which lay white eggs-produce more eggs on cheaper diets, so they are favoured by ...
美 英 英英 adj. 1. havingadelicatepalebluecolour 例句
6.The little birds' eggs had pretty blue shells.这些小鸟的蛋有美丽的蓝色蛋壳。 7.My mother always dyes eggs different colours, and we have coloured eggs for breakfast.我妈总是把蛋染上各种颜色,早饭就吃有颜色的蛋。 8.reflect light or colors like an opal.发出像蛋白体一样的颜色或者光。 9...
eggshell Also found in:Dictionary,Thesaurus,Medical,Financial,Idioms,Wikipedia. Related to eggshell:calcium carbonate 1.the hard porous protective outer layer of a bird's egg, consisting of calcite and protein 2.a yellowish-white colour 3.(of paint) having a very slight sheen ...
Clear all Finish group Eggshell Categories See morePainting & decorating Filters Brand Show more Range Show more Colour group Show more Room suitability Navigation type Base Suitable for Show more Size option Finish group Show more Application method ...
2.(Colours) a yellowish-white colour 3.(Printing, Lithography & Bookbinding) a type of paper with a slightly rough finish 4.(Art Terms) (modifier) (of paint) having a very slight sheen:an eggshell finish. 5.walk on eggshellsto be very cautious or diplomatic for fear of upsetting someone...
Eggshell Suitable for Wood Categories See morePainting & decorating Filters Brand Range Colour group Show more Room suitability Navigation type Suitable for Show more Finish group Application method Washable Drying time 1 hour Click & Collect and Home Delivery options ...