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nasty-shy [4]
3 years ago
8

Counting tree rings is an example of which type of dating

Biology
2 answers:
notka56 [123]3 years ago
7 0
Incremental dating techniques allow the construction of year-by-year annual chronologies, which can be temporally fixed (i.e., linked to the present day and thus calendar or sidereal time) or floating.

Archaeologists use tree-ring dating (dendrochronology) to determine the age of old pieces of wood. Trees usually add growth rings on a yearly basis, with the spacing of rings being wider in high growth years and narrower in low growth years. Patterns in tree-ring growth can be used to establish the age of old wood samples, and also give some hints to local climatic conditions. This technique is useful to about 9,000 years ago for samples from the western United States using overlapping tree-ring series from living and dead wood.
Verizon [17]3 years ago
6 0

Answer:

Dendrochronology

Explanation:

    The science of dendrochronology is based on the phenomenon that trees usually grow by adding rings, which goes by the name of tree ring dating. Dendrochronologists date events and variations in environments in the past, analyzing and comparing growth patterns of tree rings and ancient wood. They can determine the exact calendar year each tree ring was formed.

    Dendrochronological findings played an important role in early radiocarbon dating. Tree rings provided necessary material of truly known age to verify the accuracy of the carbon dating method 14. By the late 1950s, several scientists (and especially the Dutch Hessel de Vries) were able to confirm the discrepancy between the ages of radiocarbon and ages in calendar years through results obtained by carbon dating of tree rings. Tree rings were dated through dendrochronology.

    Currently, tree rings continue to be used to calibrate radiocarbon determinations. Collections of tree rings of different ages are available to provide records dating back to the last 11,000 years. The most common reference trees are Pinus aristata pine, found in the USA, and Quercus sp., From Ireland and Germany. Radiocarbon dating laboratories are known to have used data from other tree species.

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Answer:

It is true to say that by using cuttings, exact genetic characteristics can be maintained, because the cuttings retain the same genetic information about the plant from which they were extracted.​

Explanation:

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Answer: In this process, the energy released in form of ATP (Adenosine triphosphate) is used to POWER BIOCHEMICAL PROCESSES.

Explanation:

Aerobic respiration is the process by which living organisms breaks down glucose molecule to release energy. Oxygen is used for this process that's why the name aerobic.

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--> Krebs Cycle: this is the second stage which occurs in the mitochondria of cells. The 2 ATP molecules generated from glycolysis is used to produce two more ATP, 8 more NADH and 2 molecules of FADH. This makes it a total of 16 energy molecules ( including 2 molecules of ATP from glycolysis).

--> Electron transport chain: this is the last stage of aerobic respiration which takes part at the inner member of the mitochondria. Electrons are transported from molecule to molecule down an electron-transport chain. Some of the energy from the electrons ( NADH and FADH from kreb cycle) is used to pump hydrogen ions across the membrane, creating an electrochemical gradient that drives the synthesis of many more molecules of ATP. As a result 32 more ATP are generated.

In conclusion, a total of up to 36 molecules of ATP from just one molecule of glucose in the process of aerobic respiration which are used to power biological processes.

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