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1 day ago · Definition. A telomere is a region of repetitive DNA sequences at the end of a chromosome. Telomeres protect the ends of chromosomes from becoming frayed or tangled. Each time a cell divides, the telomeres become slightly shorter.
- Chromatid
Definition A chromatid is one of the two identical halves of...
- Deoxyribonucleic Acid
Definition Deoxyribonucleic acid (abbreviated DNA) is the...
- Chromatid
2 days ago · Soil erosion modelling: A global review and statistical analysis. To gain a better understanding of the global application of soil erosion prediction models, we comprehensively reviewed relevant peer-reviewed research literature on soil-erosion modelling published between 1994 and 2017.
2 days ago · It involves understanding the processes that have shaped the Earth’s structure over time, including plate tectonics, erosion, and sedimentation. Subfields of geology include petrology (study of rocks), mineralogy (study of minerals), and geophysics (study of the Earth’s physical properties).
2 days ago · An atom is the basic building block of chemistry. It is the smallest unit into which matter can be divided without the release of electrically charged particles. It also is the smallest unit of matter that has the characteristic properties of a chemical element.
- All atoms are roughly the same size, whether they have 3 or 90 electrons. Approximately 50 million atoms of solid matter lined up in a row would me...
- The mass of an atom consists of the mass of the nucleus plus that of the electrons. That means the atomic mass unit is not exactly the same as the...
- The single most important characteristic of an atom is its atomic number (usually denoted by the letter Z), which is defined as the number of units...
4 days ago · Chemical reactions happen at a characteristic reaction rate at a given temperature and chemical concentration. Some reactions produce heat and are called exothermic reactions, while others may require heat to enable the reaction to occur, which are called endothermic reactions.
5 days ago · science, any system of knowledge that is concerned with the physical world and its phenomena and that entails unbiased observations and systematic experimentation. In general, a science involves a pursuit of knowledge covering general truths or the operations of fundamental laws.
3 days ago · ice, solid substance produced by the freezing of water vapour or liquid water. At temperatures below 0 °C (32 °F), water vapour develops into frost at ground level and snowflakes (each of which consists of a single ice crystal) in clouds.
