Search results
Results From The WOW.Com Content Network
Voltage-gated calcium channels (VGCCs), also known as voltage-dependent calcium channels (VDCCs), are a group of voltage-gated ion channels found in the membrane of excitable cells (e.g. muscle, glial cells, neurons) with a permeability to the calcium ion Ca 2+.
The history of biology traces the study of the living world from ancient to modern times. Although the concept of biology as a single coherent field arose in the 19th century, the biological sciences emerged from traditions of medicine and natural history reaching back to Ayurveda, ancient Egyptian medicine and the works of Aristotle, Theophrastus and Galen in the ancient Greco-Roman world.
[65] [66] [67] One of the questions in the biology exam asked students to define an "independent company", which some students perceived to be a business studies question. [68] The May 2017 English literature exam (under the regulation of OCR) wrongly implied that Tybalt, a character in Romeo and Juliet, was not a Capulet. This serious flaw in ...
In 1974, he began research into the molecular and developmental biology of C. elegans, which has since been extensively used as a model organism. [13] It was the first multicellular organism to have its whole genome sequenced, and in 2019 [14] it was the first organism to have its connectome (neuronal "wiring diagram") completed. [15] [16] [17]
Historically, as in Aristotle's biology, the plant kingdom encompassed all living things that were not animals, and included algae and fungi. Definitions have narrowed since then; current definitions exclude fungi and some of the algae.
Photosynthesis changes sunlight into chemical energy, splits water to liberate O 2, and fixes CO 2 into sugar.. Most photosynthetic organisms are photoautotrophs, which means that they are able to synthesize food directly from carbon dioxide and water using energy from light.
The British Office of the Chief Rabbi (OCR) has underlined the basic principle that a child is not recognised by the OCR and other bodies as Jewish unless their mother is Jewish, or they underwent a conversion recognized by the body.
Anthropology is the scientific study of humanity, concerned with human behavior, human biology, cultures, societies, and linguistics, in both the present and past, including archaic humans. [1] Social anthropology studies patterns of behavior, while cultural anthropology studies cultural meaning, including norms and values. [ 1 ]