 Selection can doubt the possibility of the three cases above suggested, and the last of which seems to explain the possible origin of species which are mandibulate in one period of life and not in another. The change from the one condition to the other...  The Journal of the Linnean Society: Zoology - עמוד 415מאת Linnean Society of London - 1873תצוגה מלאה - מידע על ספר זה
 | Sir Norman Lockyer - 1872 - 540 דפים
...suggested, and the last of which seems to explain the possible origin of species which are mandibulate in one period of life and not in another. The change...feeding for a time, as, for instance, is the case in the silkworm. When, however, any considerable change was involved, this period of fasting would... | |
 | Sir Norman Lockyer - 1873 - 742 דפים
...suggested, the last of which seems to explain the possible origin of species which are mandibulate in one period of life and not in another. The change...such times we know that, even when there is no change to form, the temporary softness of the organs precludes the insect irom feeding for a time, as, for... | |
 | Sir Norman Lockyer - 1872 - 540 דפים
...suggested, and the last of which seems to explain the possible origin of species which are mandibulate in one period of life and not in another. The change...feeding for a time, as, for instance, is the case in the silkworm. When, however, any considerable change was involved, this period of fasting would... | |
 | Linnean Society of London - 1873 - 906 דפים
...possible origin of species which are mandibulate in one period of lile and not iu another. The chango from the one condition to the other would no doubt...skin. At such times we know that, even when there ia no change of insect from feeding for a time, as, for instance, is the case wit silkworm. When, however,... | |
 | Sir John Lubbock - 1873 - 482 דפים
...and not in another. The change from the one condition to the other would, no doubt, take place during a change of skin. At such times we know that, even...of form, the temporary softness of the organs often prevents the insect from feeding for a time — as, for instance, in the case of the silkworm. When,... | |
 | Sir John Lubbock - 1873 - 436 דפים
...suggested, and the last of which seems to me to explain the possible origin of species which are mandibulate in one period of life and not in another. The change...condition to the other would, no doubt, take place during a change of skin. At such times we know that, even when there is no change of form, the temporary... | |
 | Sir John Lubbock - 1873 - 452 דפים
...suggested, and the last of which seems to me to explain the possible origin of species which are mandibulate in one period of life and not in another. The change...condition to the other would, no doubt, take place during a change of skin. At such times we know that, even when there is no change of form, the temporary... | |
 | Sir John Lubbock - 1874 - 128 דפים
...of life and not in another. Granting then the transition from the one condition to the other, this would no doubt take place contemporaneously with a...such times we know that, even when there is no change in form, the softness of the organs temporarily precludes the insect from feeding for a time, as, for... | |
 | 1881 - 782 דפים
...the biting to form the suctorial mouth, " the transition from the one condition to the other, this would no doubt take place contemporaneously with a...such times we know that, even when there is no change in form, the softness of the organs temporarily precludes the insect from feeding for a time, as, for... | |
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