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单词 mutative
例句 mutative
He glanced back apprehensively, half expecting to find the limp white things crawling after him in sightless pursuit or snaking up through the treetops in a writhing and ungovernable mutative mass. Catch-22 1961-11-10T00:00:00Z
Some of the appendages display the kind of mutative powers that make the term "leg" redundant. Cirque bugs out extravagantly with 'Ovo' 2011-07-01T07:00:00Z
Bancel said to the Financial Times that the omicron variant’s unruly swarm of mutations has worried scientists, many of whom did not expect such a highly mutative variant to emerge for another year or two. Existing vaccines might not be effective against omicron variant right away, Moderna CEO says 2021-11-30T05:00:00Z
Indirect vicinism also plays some part, and probably affords the explanation of some reputed mutative productions of the variety. Species and Varieties, Their Origin by Mutation
The periods in which such groups occur would constitute the mutative periods. Species and Varieties, Their Origin by Mutation
Obviously they must be sought in the mutative periods, which have immediately preceded the present one. Species and Varieties, Their Origin by Mutation
This assumption requires only a limited number of mutative periods, which might well occur within the time allowed by physicists and geologists for the existence of animal and vegetable life on the earth. Species and Varieties, Their Origin by Mutation
But the chance of mutative changes in larger numbers is manifestly much reduced by this experiment, and they may be expected to form a very small proportion of the culture. Species and Varieties, Their Origin by Mutation
Such very rich genera however, are not the rule, but are exceptional cases, indicating the rarity of powerful mutative changes. Species and Varieties, Their Origin by Mutation
And in crossing experiments also the red-veins gave proof of the absence of a mutative capacity for their production. Species and Varieties, Their Origin by Mutation
On the other hand, the hypothesis of mutative periods is by no means irreconcilable with the observed facts of constancy. Species and Varieties, Their Origin by Mutation
These two main factors are consequently to be assumed in all hypothetic conceptions of previous mutative periods. Species and Varieties, Their Origin by Mutation
Such is the case with the mutative origin of Xanthium commune Wootoni from New Mexico and of Oenothera biennis cruciata from Holland. Species and Varieties, Their Origin by Mutation
This faculty must be one and the same for all the hundreds of mutative productions of the same form. Species and Varieties, Their Origin by Mutation
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更新时间:2025/1/9 2:25:15