Answer:
1. As temperature and pressure increases, density increases
Explanation:
The earth is composed of three main layers: Crust, Mantle and Core. The density or mass per unit volume of the earth's layers increases as one moves from the surface towards the interior of the earth known as the core. Also, there is an increase in pressure and temperature as depth increases. There are three main sources of heat in the earth's core: (1) conserved heat from when the planet formed and coalesced, (2) heat due to friction caused by denser core material sinking to the center of the planet, and (3) heat from the decay of radioactive elements.
The earth's core is composed almost entirely of the metals, iron and nickel. The core has an inner solid layer and a molten outer core. Iron and nickel are both very dense metals, so the core of the earth is very dense and the density increases with depth with the inner core being the most dense layer of the earth.
Mitochondria since it’s the power house of the cell where the energy for this one is produced
The inferior vena cava brings deoxygenated blood back into the heart from the lower body. For comparison, the part that directs deoxygenated blood from the upper body is the superior vena cava.
Answer:
Genes lying close to each other on chromosome
Explanation:
When genes lie close to each other on chromosome, they are inherited together as an intact unit in meiosis cell division and such genes are termed as linked genes.During meiosis the genetic material (allele/genes) is exchanged between the homologous parent chromosome which causes chromosome recombination and thus the formation of linkages These genes have high chances of recombination as they lie close to each other.
Answer:
Please the explanation below
Explanation:
DNA synthesis occur at the S phase of the cell cycle in preparation for cell division. The process which is also known as DNA replication occur in 3 main stages namely:
- Initiation
- Elongation
- Termination
At the initiation stage, the double helix DNA structure is unwound by DNA helicase enzyme to form a Y shape structure known as the replication fork. A short pieces of RNA called primer then binds to 3' end of the DNA strands at the starting point of replication.
During elongation, an enzyme known as DNA polymerase adds bases to the primer in the 5' to 3' direction. This makes the replication of the leading strand to be continuous. RNA primer binds to the lagging strand at multiple regions and are replicated in short disjointed fragments known as okazaki fragments. This kind of replication is discontinuous.
Termination involves the unbinding of RNA primer by an exonuclease enzyme. The primers are then replaced by relevant bases. Proofreading of the newly synthesized strands takes place and the okazaki fragments are joined together by an enzyme known as DNA ligase. Telomerase enzyme then adds telomeres to the end of the DNA strands and each newly synthesized strand winds to its parent strand.
