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from article Heterodonta
Common heterodont bivalves. (Credit: Ronald V. Dimock, Jr.)
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Image
from article Heterodonta
Common heterodont bivalves. (Credit: Ronald V. Dimock, Jr.)
Image
from article Restoration ecology
Restored sand dune habitat at Cape Canaveral, Florida. To help prevent erosion, 180,000 shrubs, including grasses, sunflowers, vines, sea grapes, and saw palmettos, were planted. (Credit: Dan Casper/National Aeronautics and Space Administration)
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from article Behavioral psychophysics
Diagram of the apparatus for measuring the pigeon's absolute visual threshold. (After D S. Blough, A method for obtaining psychophysical thresholds from the pigeon, J. Exp. Anal. Behav., 1:31–43, 1958)
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from article Biological productivity
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from article Hepaticopsida
Jungermanniidae, the leafy liverworts. (a) Herberta, showing three ranks of equal bifid leaves. (b) Lepidozia, ventral aspect, showing reduced ventral leaves. (c) Leucole jeunea, ventral aspect, showing reduced ventral leaves and complicate dorsal…
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from article Hepaticopsida
Diagram of life cycle of the liverwort Marchantia, indicating stages at which chromosome changes occur. (After H. J. Fuller, The Plant World, rev. ed., Holt, 1951)
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from article Hepaticopsida
Transverse sections through the thallus of Marchantia. (a) Middle portion with scales and rhizoids on the underside. (b) Margin of the thallus more highly magnified. (After H. Kraemer, Applied and Economic Botany, 2d ed., Wiley, 1916)
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from article Hepaticopsida
Marchantia. (a) Example of male gametophyte (antheridial plant) (after H. J. Fuller and O. Tippo, College Botany, Holt, 1949). (b) Section through an antheridial receptacle (after W. J. Robbins and H. W. Rickett, Botany, 3d ed., Van Nostrand, 1939).
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from article Hepaticopsida
Marchantia. (a) Example of female gametophyte (archegonial plant) (after H. J. Fuller and O. Tippo, College Botany, Holt, 1949). (b) Section through an archegonial receptacle (after W. J. Robbins and H. W. Rickett, Botany, 3d ed., Van Nostrand,…
