A Quote by Aristid Lindenmayer
The development of an organism ... may be considered as the execution of a 'developmental program' present in the fertilized egg. ... A central task of developmental biology is to discover the underlying algorithm from the course of development.
Quote Topics
Quote Author
Related Quotes
Thyroid secretions in adequate amounts appear to be essential for development of the egg and for proper ovarian secretions. If thyroid function is low, an egg may be discharged from an ovary but it may not be fertilizable or, if fertilized, may not be capable of nesting so that pregnancy is quickly aborted.
As with most animal eggs, the early events of amphibian development are largely independent of the environment, and the processes leading to cell differentiation must involve a redistribution and interaction of constituents already present in the fertilized egg.
Evolution, cell biology, biochemistry, and developmental biology have made extraordinary progress in the last hundred years - much of it since I was weaned on schoolboy biology in the 1930s. Most striking of all is the sudden eruption of molecular biology starting in the 1950s.
Normal children of both sexes and all cultures will follow a more or less standard and universal developmental pattern and timetable, and reach approximately the same level of development at maturity. While a particular culture's need and expectations and teaching will shape the course of development and affect adult capabilities to some degree, normal individuals, whatever their native culture, if transplanted and taught, could learn to meet the normal demands of their adapted cultures.
The importance of the egg's non-nuclear material - the cytoplasm - in early development is apparent in the consistent relation that is seen to exist between certain regions in the cytoplasm of a fertilized egg and certain kinds or directions of cell differentiation.
We need to take a less narrow look at our children’s problems and, instead, see them as windows of opportunity—a way of exploring and understanding all facets of our children’s development. If we can understand the underlying developmental process, we can see a child’s struggles as signs of striving toward growth instead of chronic problems or attempts to aggravate adults.
It will be in the convergence of evolutionary biology, developmental biology and cancer biology that the answer to cancer will lie. Nor will this confluence be a one-way street.
Our task now is to resynthesize biology; put the organism back into its environment; connect it again to its evolutionary past; and let us feel that complex flow that is organism, evolution, and environment united. The time has come for biology to enter the nonlinear world.
Endings are a part of life, and we are actually wired to execute them. But because of trauma, developmental failures, and other reasons, we shy away from the steps that could open up whole new worlds of development and growth.
I would love to see TNA get a developmental program.
Developmental readings are actually the best part of being an actor for me. I once spent a month doing so many developmental readings at the Roundabout that we all joked that I was an 'artist in residence' there. But to me, it's such a special time to be involved with a new play.
Heredity is to-day the central problem of biology. This problem may be approached from many sides - that of the breeder, the experimenter, the statistician, the physiologist, the embryologist, the cytologist - but the mechanism of heredity can be studied best by the investigation of the germ cells and their development.
Phylogeny and ontogeny are, therefore, the two coordinated branches of morphology. Phylogeny is the developmental history [Entwickelungsgeschichte] of the abstract, genealogical individual; ontogeny, on the other hand, is the developmental history of the concrete, morphological individual.
Over fertilized plants may be beautiful but are otherwise useless, like people whose energies are devoted so completely to their appearance that there is no other development.
The distance between the actual developmental level as determined by independent problem solving and the level of potential development as determined through problem solving under adult guidance or in collaboration with more capable peers
A key issue in developmental biology at that time was the problem of how cells underwent differentiation, with most workers concentrating on explanations in terms of changes in enzyme and gene regulation.
Related Authors
Albert Szent-Gyorgyi Quotes
Hungarian
Scientist
Andy Grove Quotes
Hungarian
Businessman
Arthur Koestler Quotes
Hungarian
Writer
Erno Rubik Quotes
Hungarian
Inventor
Franz Liszt Quotes
Hungarian
Composer
George Friedman Quotes
Hungarian
Scientist
George Polya Quotes
Hungarian
Mathematician
George Soros Quotes
Hungarian
Businessman
Harry Houdini Quotes
Hungarian
Entertainer
Joe Eszterhas Quotes
Hungarian
Writer
Judit Polgar Quotes
Hungarian
Celebrity
Lajos Kossuth Quotes
Hungarian
Lawyer
Mihaly Csikszentmihalyi Quotes
Hungarian
Psychologist
Theodor Herzl Quotes
Hungarian
Journalist
Viktor Orban Quotes
Hungarian
Politician
Zsa Zsa Gabor Quotes
Hungarian
Actress