The Scientific Monthly, Volumen7James McKeen Cattell American Association for the Advancement of Science, 1918 |
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Página 39
... species there is no irresistible im- pulse to gorge itself with blood and usually the mature form never feeds . The eggs are laid in rows in a gelatinous sack which is attached to some object at the surface of flowing water . Each sack ...
... species there is no irresistible im- pulse to gorge itself with blood and usually the mature form never feeds . The eggs are laid in rows in a gelatinous sack which is attached to some object at the surface of flowing water . Each sack ...
Página 46
... SPECIES AS GROUPS OF GENES One of the most interesting ideas that De Vries brought forward in his mutation theory was that groups of " small species " or of varieties are made up of many common genes and differ in a relatively small ...
... SPECIES AS GROUPS OF GENES One of the most interesting ideas that De Vries brought forward in his mutation theory was that groups of " small species " or of varieties are made up of many common genes and differ in a relatively small ...
Página 47
... species have many genes in common they may be expected to produce at times the same mutants . In fact , it is not at all uncommon to find even in Mendelian literature such forms as albinos spoken of as though they represent the same ...
... species have many genes in common they may be expected to produce at times the same mutants . In fact , it is not at all uncommon to find even in Mendelian literature such forms as albinos spoken of as though they represent the same ...
Página 48
... species of the genus Drosophila . In a species , D. virilis , he has had 12 mu- tants appear and these fall into three groups of linked genes . Three of them , yellow , forked and confluent , resemble externally characters of D ...
... species of the genus Drosophila . In a species , D. virilis , he has had 12 mu- tants appear and these fall into three groups of linked genes . Three of them , yellow , forked and confluent , resemble externally characters of D ...
Página 49
James McKeen Cattell. Unless such species can be crossed the only convincing evidence that we can hope to get will be to ... species , it would follow that decreases in this amount are more likely to happen than increases , hence the VOL ...
James McKeen Cattell. Unless such species can be crossed the only convincing evidence that we can hope to get will be to ... species , it would follow that decreases in this amount are more likely to happen than increases , hence the VOL ...
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activity American animals army atoms become birds bonds Cayuga Lake cent chemical chemistry chemists civilization cost course democracy disease economic effect electrons engineering ethical evidence evolution experience fact factors field Finger fish fossil German hand horned dace human ical ideas important increase individual industrial institutions intelligence interest Irenæus Jurassic knowledge labor Lake larvæ less lines manufacturing material means ment mental method Microscope mind modern mosasaur museum nation nature organization physical PIURA RIVER plant pathology plants Polype pond possible practical present primitive principles problems production Professor progress quadratic residues religion research laboratory ridges scientific scientific management society Solnhofen South Georgia species stream success taxes teaching technical things THOMAS CORWIN MENDENHALL tical tion to-day Van't Hoff vitamine weather
Pasajes populares
Página 75 - Here is wisdom. Let him that hath understanding count the number of the beast : for it is the number of a man ; and his number is Six hundred threescore and six.
Página 79 - And they cast dust on their heads, And cried, weeping and wailing, saying, Alas, alas that great city, Wherein were made rich all that had ships in the sea by reason of her costliness! For in one hour is she made desolate.
Página 447 - ... as thou didst before the creation of the firmament, the division of light from darkness; let the children of thy spirit, placed in their firmament, make their light shine upon the earth, mark the division of night and day, and announce the revolution of the times; for the old order is passed, and the new arises; the night is spent, the day is come forth; and thou shalt crown the year with thy blessing, when thou shalt send forth labourers into thy harvest sown by other hands than theirs; when...
Página 447 - Let us not leave thee alone to make in the secret of thy knowledge, as thou didst before the creation of the firmament, the division of light from darkness; let the children of thy spirit, placed in their firmament, make their light shine upon the earth, mark the division of night and day, and announce the revolution of the times; for the old order is passed, and the new arises; the night is spent, the day is come forth...
Página 288 - Goode, the Assistant Secretary of the Smithsonian Institution, in charge of the National Museum.
Página 79 - And there are seven kings: five are fallen, and one is, and the other is not yet come; and when he cometh, he must continue a short space. 11 And the beast that was, and is not, even he is the eighth, and is of the seven, and goeth into perdition.
Página 78 - And it was given unto him to make war with the saints, and to overcome them : and power was given him over all kindreds, and tongues, and nations.
Página 215 - Beware of determining and declaring your opinion suddenly on any object; for imagination often gets the start of judgment, and makes people believe they see things, which better observations will convince them could not possibly be seen : therefore assert nothing till after repeated experiments and examinations in all lights and in all positions.
Página 384 - The primary purpose of the Students' Army Training Corps is to utilize the executive and teaching personnel and the physical equipment of the educational institutions to assist In the training of our new armies.
Página 441 - The end of wealth man never fails to desire with a steady, uniform, constant passion. Of every other human passion or motive political economy makes entire abstraction. Love of country, love of honor, love of friends, love of learning, love of art, pity, shame, religion, charity, will never, so far as political economy cares to take into account, withstand the efforts of the economic man to amass wealth.