In the middle of the atom there is a nucleus. ... Electron are not in the nucleus like the protons and neutrons are. ... The energy levels are like orbits that surround the nucleus. ... Scientists have discovered 109 elements, 90 were found in nature, and 19 were artificially made in laboratories by scientists. ... It contains one proton and one neutron in the nucleus. ...
Plant Kingdom The plant kingdom comprises of about 260,000 known species of mosses, liverworts, ferns, herbaceous and woody plants, bushes, vines, trees, and various other forms that cover the Earth and are also found in waters. ... Plants are multicellular eukaryotes; their cells contain membrane-bound structures called organelles. ... During photosynthesis, plants make their own food by converting light energy into chemical energy, a process carried out in the green cellular organelles called chloroplasts Parts of the Plants Cells: The many varieties of plant species have distinc...
A good example of known uncertainty (error) is found with polling results. ... An atom contains a dense inner region called the nucleus. The nucleus contains the atom's protons and neutrons. ... The outer region occupied by electrons is much larger than the dense nucleus. The electrons are thought to orbit the nucleus within an area, the size and shape of which are related to the electrons' energy. ...
It is an element found in countless products, including steel, batteries, aluminum, animal feed, and welding metals. ... Once inside these cells, the heavy metal provokes a series of biochemical and molecular events leading to cell death induced by apoptosis and/or necrosis (Roth & Garrick 2003). ... An additional study was conducted by a Japanese neurologist who found a form of L-dopa responsive "juvenile parkinsonism" (Yokochi, Narabayashi, Izuka, & Nagatsu 1984). ... The specific mechanism of cell death is still under research. ... Necrosis is the disruption and disposal of a cell and i...
The area of the body known as the lumbar region would be found at the: upper arm neck foot lower back 3. ... Organelle f. Cell g. ... Describe the major body cavities, what organs are found in each and be able to identify them on a diagram. ... Where is each found? ...
Osseous tissue contains specialized cells, cell products, and a fluid matrix. ... These lacunae are found between narrow sheets of calcified matrix, known as lamellae. ... The composition of bone consists of cells including osteoblasts, osteocytes, and osteoclasts, bone lining cells, the extracellular matrix, and the periosteum and endosteum. Osteoblasts are derived from osteoprogenitor cells, which are like stem cells for the bone, which are mesenchymal in origin. ... Compared with osteoblasts, osteocytes are smaller and have fewer numbers of organelles, although they do have a significant nu...
