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from article Palynology
Pollen and spore morphology, (a, b) Spores. (c–j) Pollen grains. (After Y. Iwanami, T. Sasakuma, and Y. Yamada, Pollen: Illustrations and Scanning Electron Micrographs, Kodansha and Springer, 1988)
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from article Palynology
Pollen morphology and sporoderm ultrastructure of Cabomba caroliniana (Cabombaceae), a modern water lily and primitive flowering plant. (a) Distal view of grain. (b) Cross section through the entire grain. (c) Cross section through the sporoderm.
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from article Maternal behavior
In this display of maternal behavior, a mother robin pauses while feeding her three chicks. (Credit: Paul Mozell/Alamy Images)
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from article Maternal behavior
The mother cow is responsible for providing milk for the young calf. (Credit: Anjo Kan/Shutterstock)
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from article Hallucination
Brain regions that may be involved in hallucinations. The thalamus, another important brain structure, is not depicted here as it is buried deep inside the brain. (Copyright © American Psychological Association; reproduced with permission from A.…
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from article Acrotretida
Morphology of dorsal (left) and ventral (right) valve interiors of Ceratreta. [After R. L. Kaesler, ed., Treatise on Invertebrate Paleontology, pt H: Brachiopoda, rev. vol. 2, Geological Society of America/University of Kansas Press, Boulder,…
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from article Acrotretida
Ceratreta hebes dorsal valve exterior (a, ×18), interior (b, ×18), and oblique interior, illustrating the median septum (c, ×21); ventral valve exterior, apical view (d, ×15), illustrating the slit-like apical foramen, oblique lateral view (e, ×18)…
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from article Alcoholism
Deaths as a result of alcohol poisoning: (left) alcohol poisoning deaths are most common among middle-aged adults; (right) men are approximately three times more likely to die from alcohol poisoning compared to women. (Credit: National Vital…
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from article Alcoholism
Punctate hemorrhages in the mammillary bodies of the brain displaying evidence of Wernicke encephalopathy. This complication is often seen in chronic alcohol abusers and affects thiamine uptake and utilization. (Copyright © McGraw Hill)
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from article Alcoholism
Alcohol dependence or abuse among adults aged 21 years or older within a 12-month period as a function of the age of the individual at the first use of alcohol. (Credit: Substance Abuse and Mental Health Services Administration, U.S. Department of…
