추천검색어 페더 패더

d라이브러리

"Feather"(으)로 총 5건 검색되었습니다.

(1) 진화는 때때로 신속하게 이뤄진다과학동아 l199107

따르면 동물의 발생초기에 형성되는 초기 표피세포층은 발생조건에 따라 비늘(scale) 깃털(feather) 또는 털(hair)로 분화되는데 결코 이들의 중간형태로는 분화되지 않는다는 것이다. 또한 단속평형설에서 주장하는 진화양상을 보인다고 가정하면 새로운 환경에 도전하는 소수의 개체가 짧은 기간 내에 ... ...

아인슈타인은 역시 옳았다.과학동아 l199106

their mass, fall at the same speed(if such things as air resistance are disregarded). In a vacuum, a cannonball and a feather drop at the same rate. This is called the principle of equivalence. ...

최고(最古)의 날짐승과학동아 l198808

have at the base of their tail. This means that the fossil had a bird-tail instead of a lizard-tail. A bird-tail has feathers that act as a brake on flight when the bird is landing-again eviden ...

책의 혁명과학동아 l198712

than papyrus ever was and is in more plentiful supply. The Egyptians applied ink with fine brushes, but since then feather quills, steel pens, fountain pens, ball-point pens and so on have been ...

가장 큰 날짐승과학동아 l198709

that they must have been warm-blooded, which would mean that they were covered with hair. (Not feather, If they had feathers we would probably have found impressions of them on and occas ...