Terms: reproduction
Matches: 9
Displayed: 5
Categories
Specific Results
- -02-07-06 Brain Hormone Puts Brakes on Reproduction (Brightsurf.com)
"The hormone, a small protein, or peptide, called gonadotropin-inhibitory hormone (GnIH), puts the brakes on reproduction by directly inhibiting the action of the central hormone of the reproductive system–gonadotropin releasing hormone (GnRH). GnRH stimulates the pituitary gland to activate the reproductive system, whereas GnIH appears to reduce the effects of GnRH stimulation."
- College level - Basic Biology (Farabee)
Includes Introduction to the Nature of Science and Biology, Chemistry 1 (Atoms and Molecules), Chemistry II (Water and Organic Molecules), Cells (Origins and Cellular Organization), Transport in and out of Cells, Cell Division (Binary Fission, Mitosis, Meiosis, and Sexual Reproduction), Laws of Thermodynamics, Reactions and Enzymes, ATP and Biological Energy, Cellular Metabolism and Fermentation, Photosynthesis, Introduction to Genetics, Gene Interactions, DNA and Molecular Genetics, Human Genetics, Protein Synthesis, Control of Gene Expression, Plants and their Structure, Flowering Plant Reproduction (Flower Structure, Fertilization, and Fruits), Plant Hormones and Nutrition, Animal Cells and Tissues, Animal Organ Systems and Homeostasis, the Integumentary System, the Circulatory Sytems, Lymphatic System and Immunity, the Digestive System, the Nervous System, the Endocrine System, the Reproductive System, the Muscular and Skeletal Systems, the Respiratory System, the Excretory System, Development of Evolutionary Theory, The Modern View of Evolution, Biological Diversity (Classification, Viruses, Bacteria, Archaeans, Protists - Stem Eukaryotes, Fungi, Nonvascular Plants and Nonseed Vascular Plants, Seed Plants, and Animals), Human Evolution, Population Ecology, Community and Ecosystem Dynamics, the Biosphere and Mass Extinctions, and Glossary. 12-02
- Octopus (Thinkquest 12880)
Provides information on the habitat, physiology, predators, and reproduction of the octopus. 4-03
- New Theory Rejects Single-Ancestor Doctrine (Scientific American)
"Instead of one universal evolutionary tree, picture a three-trunk stand sharing a communal root system. A new theory of cellular evolution published in the current issue of the Proceedings of the National Academy of Sciences rejects Charles Darwin’s Doctrine of Common Descent—the idea that all organisms are derived from a single primordial ancestor. Instead, Carl Woese of the University of Illinois-Champaign proposes that the three cell types that comprise life on earth arose from three forms of proto cells that swam together in a dense genetic soup, freely sharing their DNA."
"Indeed, such DNA swapping was the driving force in the evolution of unicellular organisms, Woese argues. Biologists have traditionally credited this so-called horizontal gene transfer with just a minor role in cellular evolution. But Woese asserts that only by sharing their genes—or evolutionary inventions, as he calls them—could simple cellular organizations have given rise to more complex cell designs. In the beginning, he says, primitive cells 'did not have stable genealogical records.' But eventually, these lines—including the three that spawned all extant life forms—reached what Woese terms the "Darwinian threshold," the point at which a lineage matures to genetic stability. Here the cellular organization became fixed, leading to a traceable cell line via reproduction. 'Crossing a Darwinian threshold leads to a more solidified, organized cellular design,' he explains." 12-05
- The Beatles in 09-09-09 (CNN News)
"On Wednesday -- 9/9/09 -- remastered versions of the Beatles catalogue will be released, giving listeners what the remaining members of "The Fab Four" say is the closest reproduction ever of how their music sounded in the studio."
"A Pew Research survey released last month showed that 81 percent of respondents between ages 16-29 said they liked The Beatles. Eleven percent said they dislike the band and only 4 percent said they have never heard of them." 09-09
Back to Top
Send comments to
[Dr. Jerry Adams at jadams@awesomelibrary.org.]
|