Search results
Results From The WOW.Com Content Network
Developmental biology is the study of the process by which animals and plants grow and develop. Developmental biology also encompasses the biology of regeneration, asexual reproduction, metamorphosis, and the growth and differentiation of stem cells in the adult organism.
Development before birth, or prenatal development (from Latin natalis 'relating to birth') is the process in which a zygote, and later an embryo, and then a fetus develops during gestation. Prenatal development starts with fertilization and the formation of the zygote , the first stage in embryonic development which continues in fetal ...
For example, Kieran McNulty covers the potential utilities and constraints of using incomplete fossil taxa to examine longitudinal development in Australopithecus africanis. [10] Many studies on development have been human-specific. In his 2011 paper, Bernard Crespi focused on adaptation and genomic conflict in childhood diseases.
Later, more specific similarities were discovered: for example, the distal-less gene was found in 1989 to be involved in the development of appendages or limbs in fruit flies, [40] the fins of fish, the wings of chickens, the parapodia of marine annelid worms, the ampullae and siphons of tunicates, and the tube feet of sea urchins.
Cancer is an example of highly abnormal and pathological tissue morphogenesis. Morphogenesis also describes the development of unicellular life forms that do not have an embryonic stage in their life cycle. Morphogenesis is essential for the evolution of new forms.
For example, if Population 1 has higher growth than Population 2 in their respective natural environments, countergradient variation can be detected if, when brought to the same environment, Population 1 now has lower growth than Population 2. Many of the examples listed above were discovered through these types of experiments.
Examples include searching for food, mating, and vocalizations. Physiological adaptations permit the organism to perform special functions such as making venom, secreting slime, and phototropism, but also involve more general functions such as growth and development, temperature regulation, ionic balance and other aspects of homeostasis ...
In developmental biology, pattern formation refers to the generation of complex organizations of cell fates in space and time. The role of genes in pattern formation is an aspect of morphogenesis, the creation of diverse anatomies from similar genes, now being explored in the science of evolutionary developmental biology or evo-devo.