Video Experimental Relacionado
Updated: Apr 11, 2026
07:56
Measuring Skeletal Muscle Thermogenesis in Mice and Rats
Published on: July 27, 2022
3.6K
Respuesta a los comentarios sobre "Evidencia de la mesotermia en los dinosaurios"
John M Grady1, Brian J Enquist2, Eva Dettweiler-Robinson3
1Department of Biology, University of New Mexico, Albuquerque, NM 87131, USA. jgrady@unm.edu.
Science (New York, N.Y.)
|May 30, 2015
Resumen
Este estudio aborda las críticas al crecimiento de los dinosaurios y el análisis energético. Los autores encontraron que las mejoras estadísticas y metodológicas propuestas carecían de justificación biológica.
Área de la Ciencia:
- Paleontología Paleontología.
- Ciencias Biológicas Ciencias Biológicas.
- Biología de los vertebrados Biología de los vertebrados.
Sus antecedentes:
- Se ha publicado un análisis reciente del crecimiento y la energía de los dinosaurios.
- Se han planteado críticas estadísticas y metodológicas contra este análisis.
Objetivo del estudio:
- Para abordar las críticas estadísticas y metodológicas de un reciente crecimiento de dinosaurios y análisis energético.
- Evaluar la justificación biológica y estadística de las mejoras propuestas.
Principales métodos:
- Revisión de críticas estadísticas y metodológicas.
- Evaluación de la validez biológica y estadística de las mejoras propuestas.
Principales resultados:
- Las críticas y las mejoras sugeridas carecen de justificación biológica.
- Las críticas y las mejoras sugeridas carecen de justificación estadística.
Conclusiones:
- El análisis original del crecimiento y la energía de los dinosaurios sigue siendo robusto.
- La investigación adicional debe centrarse en metodologías biológicas y estadísticamente sólidas.
Videos de Conceptos Relacionados
02:56The Fossil Record
28.6K
The fossil record documents only a small fraction of all organisms that have ever inhabited Earth. Fossilization is a rare process, and most organisms never become fossils. Moreover, the fossil record only exhibits fossils that have been discovered. Nevertheless, sedimentary rock fossils of long-lived, abundant, hard-bodied organisms dominate the fossil record. These fossils offer valuable information, such as an organism's physical form, behavior, and age. Studying the fossil record helps...
28.6K
02:55The Evidence for Evolution
50.7K
Genetic variations accumulating within populations over generations give rise to biological evolution. Evolutionary changes can result in the formation of novel varieties and entire new species. These changes are responsible for the diverse forms of life inhabiting the planet. The evidence for evolution suggests that all living organisms descended from common ancestors.
50.7K
01:29Diversity of Archaea IV
611
Hyperthermophilic archaea are a group of extremophiles thriving at temperatures above 80°C, often in hydrothermal vents and volcanic soils where conditions surpass the boiling point of water. At such temperatures, proteins, membranes, and DNA in most organisms degrade, but hyperthermophiles have evolved remarkable adaptations to maintain stability and function.Unique Cellular FeaturesHyperthermophilic membranes are composed of a monolayer of biphytanyl tetraether lipids, which resist...
611
01:21Hyperthermophilic Bacteria
767
Domain Bacteria includes some unique hyperthermophilic species. They exhibit remarkable adaptations that enable survival in extreme environments.Thermotoga species are rod-shaped, gram-negative, non-sporulating hyperthermophiles that form a sheath-like envelope called a toga. They ferment sugars or starch, producing lactate, acetate, CO₂, and H₂, and can also grow via anaerobic respiration using H₂ and ferric iron. Found in hot springs and hydrothermal vents, over 20% of their...
767
01:26Thermoregulation
3.3K
The human body has a sophisticated thermoregulation system that employs negative feedback mechanisms to maintain an optimal core temperature. When the core temperature drops, peripheral and central thermoreceptors send signals to the hypothalamus, activating the heat-promoting center. This center triggers several responses aimed at increasing the core temperature. First, vasoconstriction reduces the flow of warm blood from internal organs to the skin so that the heat is not lost from the skin,...
3.3K
01:50Global Climate Change
29.8K
Throughout its ~4.5 billion year history, the Earth has experienced periods of warming and cooling. However, the current drastic increase in global temperatures is well outside of the Earth’s cyclic norms, and evidence for human-caused global climate change is compelling. Paleoclimatology, the study of ancient climate conditions, provides ample evidence for human-caused global climate change by comparing recent conditions with those in the past.
29.8K