Answer:
Pulling apart or separation of sister chromatids
Explanation:
Meiosis is a type of cell division that results in four daughter cells with each having half number of chromosomes as the parent cell. It is the cell division that leads to formation of gametes to enable sexual reproduction. Division occurs twice during meiosis because before the two halves of a duplicated chromosome called sister chromatids separate, it still needs to separate homologous chromosome, which is a similar but non-identical pair of chromosome received from both parents. Hence, meiosis occurs in a two step division process i.e. Meiosis I and Meiosis II.
Meiosis II is the mitotic division of each of the haploid cells produced in meiosis I. Note that, homologous chromosomes separate in anaphase I of meiosis I, and further undergoes cytokinesis (division of cytoplasm) to produce two haploid (reduced number of chromosomes) daughter cells.
During anaphase of meiosis II, the individual chromosomes (sister chromatids) separate at the centromeres (point of attachment between two sister chromatids). The separated chromosomes are pulled apart towards each pole of the cell by the spindle fibres.
B. a few kilometers below Earth’s surface.
C. just below Earth’s surface.
D. on Earth’s surfac
Most metamorphic processes take place B. a few kilometers below Earth’s surface.
Metamorphism is the change of minerals or geologic texture in pre-existing rocks without the protolith melting into liquid magma. Metamorphism often occurs on two scales: contact and regional. Contact metamorphism occurs locally in areas adjacent to igneous intrusions or in areas that are in contact with hot water known as hydrothermal fluids. Whereas regional metamorphism occurs over much larger areas such as rising mountain ranges, large igneous intrusions can form and warp overlying strata increasing the pressures above the intrusion. Regional metamorphism usually produces foliated rocks such as gneiss and schist.
There are other ways that metamorphic rocks can form, Dynamic metamorphism. Dynamic Metamorphism also occurs because of mountain-building. The huge forces of heat and pressure cause the rocks to be bent, folded, crushed, flattened, and sheared.
Metamorphic rocks form when increased heat and pressure force physical changes in the crystalline structure of an existing rock. Under the right conditions, any type of rock can become a metamorphic rock including igneous rocks, sedimentary rocks, and even other metamorphic rocks. Therefore metamorphic processes result due to intense heat and high pressure below the Earth's surface.
Grade: 9
Subject: biology
Chapter: metamorphic processes
Keywords: metamorphic processes
Most metamorphic process takes place a few kilometres below Earth’s surface. The metamorphic process occurs due to the presence of intense heat and high pressure below the surface of Earth.
Further Explanation:
The metamorphism of rocks is due to either due to the physical or chemical alteration by dense heat and high pressure exhibited by a sedimentary or igneous material into a denser form. Rocks are compacted into a smaller volume of space due to actions of tectonic plates, presence of shearing forces for a more extended period, stress and compression. All these factors play an essential role in the wrapping and deformation of rocks.
Due to this, the metamorphic rocks are denser than the original sedimentary material. So such rocks are less susceptible to breakdown due to erosion. The process of metamorphism is also influenced by chemically active fluids that are circulated around the newly forming rock and also introduce different ions results in the formation of a new and different mineral.
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Answer Details:
Grade: High School
Subject: Biology
Topic: Minerals and Rocks
Keywords:
Metamorphic rocks, erosion, sedimentary rocks, rocks, igneous rocks, minerals, chemicals, lava, temperature, pressure.
A precipitation reaction is a reaction between two aqueous solutions that results in the formation of A SOLID compound.
A precipitation reaction is a type of reaction in which two solutions containing soluble salts react together to produce an insoluble salt (solid) called 'the precipitate'. The precipitate occurs as a result of the combination of the cations and the anions in the solutions. Precipitation reactions are usually used in chemistry to determine the types of ions that are present in solutions.
A precipitation reaction is theformation of a solid compound from the reaction between two aqueoussolutions. The solid compound that is formed is called precipitate. The aqueoussolution that causes the formation of the solid compound is called precipitant.
Answer:
Proteins
Explanation:
Answer:
The synthesis of an amino acid follows this pathway: precursor A → intermediate B → amino acid C. Each reaction is catalyzed by a different enzyme. This metabolic pathway is controlled by feedback inhibition with amino acid C inhibiting the conversion of precursor A to intermediate B. Amino acid C acts as a noncompetitive inhibitor of the first enzyme in the pathway.
Explanation:
A no-competitive inhibitor reduces the activity of an enzyme by binding at its active site although it has already bound to the corresponding substrate
Amino acid C acts as a noncompetitive inhibitor, regulating its own production via feedback inhibition. This is a common mechanism used in metabolic pathways to maintain balance.
In the described pathway, amino acid C regulates its own production by inhibiting the first step of the pathway. This is an example of a regulatory mechanism called feedback inhibition. Essentially, when there's plenty of amino acid C present, it will bind to the first enzyme in the pathway, preventing its action and thus stopping more of amino acid C from being produced. So, in this scenario, amino acid C is acting as a noncompetitive inhibitor of the first enzyme in the pathway.
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