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3 years ago

Counting tree rings is an example of which type of dating

2 answers:

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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After watching the video, how would you define the term ecological relationship? Are they always beneficial to organisms involve

dangina [55]

Answer:

There is no video but ecological relationship will be defined on a general note and it is not always beneficial to organisms.

Explanation:

In an ecosystem, organisms of the same or different species tend to interact with one another. This interaction is referred to as ECOLOGICAL RELATIONSHIP between the involved organisms. An ecological relationship can be of different types depending on the effect.

SYMBIOSIS is an ecological relationship between two organisms that interact together. SYMBIOSIS can either be mutualistic (both organisms benefit), parasitic (one organism loses and one gains), or commensalistic (one organism benefits and one neither benefits or loses). Another ecological relationship is PREDATION, where one organism called the PREDATOR feeds on part or all of another organism called PREY in order to obtain energy.

As stated above, some of the organisms involved in an ecological relationship benefits while others lose. Hence, it is not always a beneficial relationship to organisms.

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3 years ago

How many skull bone in human body?

balu736 [363]

Answer:

There are 29 skull bones in human body.

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3 years ago

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Which substance is coded by a length of dna

Rudiy27

Answer: a specific protein

Explanation:

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2 years ago

Ninhydrin is used on a latent print to detect

oksano4ka [1.4K]

I think it is D I’m not sure

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2 years ago

In the study of human evolution, scientists define modern in terms of:

Lina20 [59]

Answer: a) a series of anatomical traits that distinguish Cro-magnon features from Neandertals.

Neanderthals (Homo neanderthalensis) were first discovered in Germany in 1856 and are believed to emerged between 100,000 and 200,000 years ago.

Significant differences found in the human and Neanderthal includes: 1) their DNA, 2) the brain of a Neanderthal had a raised larynx and was also bigger, and 3) Compared to modern humans, Neanderthals had bigger and muscular body but with shorter legs.

Cro-magnon is the earliest known Western European example of our species who lived 35,000 and 10,000 years ago. They are believed to be actually modern in every anatomical respect. They are much like us.

Neanderthal and Cro-magnon were believed to overlap in Europe for a thousand years but long-term interbreeding was not seen.

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3 years ago