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3 years ago

When do you have to rely on physical traits instead of DNA?

2 answers:

6 0

We have to rely on physical traits instead of DNA in the case of FOSSILS. Fossils almost never contain DNA, since Fossils are organisms that have been dead for so many many years, so it is not possible to take any samples.

user100 [1]3 years ago

3 0

Answer: We rely on the physical traits instead of the DNA when there is no pressence of DNA to be observed.

In case of prokaryotes where there is no true nucleus we need to rely on the physical traits. In case of fossil, no soft tissue is left only hard tissues is left to be studied, in this

There are some more conditions in which there is no pressence of DNA or there is no proper equipment to study DNA.

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What are the disadvantages of development in places like Cambodia?

ohaa [14]

Cambodia is among the most poorest country economically and socially
The disadvantages of development in places like Cambodia because
<span> People living in poverty often lose their homes for the sake of developmenten
</span>because people loses their home and get even more poorer and loses their last wealth which is their homes
so i conclude correct option is B
hope it helps

7 0

4 years ago

Read 2 more answers

Amolecule of dna was found to contain 120 adenine and 120 guanine bases.how many nucleotides comprise this molecule of dna?

coldgirl [10]

Answer:

480 nucleotides comprise this molecule of dna

Explanation:

According to Chargaff rule,

Adenine is paired with thymine

Cytosine is paired with guanine

Given in the question

Adenine residue = 120

Cytosine residue = 120

So, [A] = [T]

i.e. [A =120] = [T=120]

again, [C] = [G]

i.e. [C=120] = [G=120]

hence, total number of nucleotides present

=> [A] + [T] + [C] + [G]

=> 120 + 120 +120 +120

=> 480.

3 0

3 years ago

Helpppppppp

andre [41]

Dendrochronology, or tree-ring dating, provides absolute dates in two different ways: directly, and by calibrating radiocarbon results. Cross-dating determines the age of undated wood by directly matching ring patterns with trees of known age.

Hope this helps ^^

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3 years ago

With as much detail as possible, give another example of an analogy for describing prokaryotic cells and eukaryotic cells.

Mama L [17]

<span>For example, a prokaryotic cell is an uncivilized society while the eukaryotic cell is a more systematized society, with coordination and cooperation and a leader.

Eukaryotic cells has a nucleus while prokaryotic cells do not. Eukaryotic cells have more than one chromosomes and is usually multicellular while the prokaryotic cells has only one chromosome and it's not even a genuine one, only plasmids and has unicellular however some cyanobacteria maybe multicellular. Eukaryotic cells have genuine membrane-bound nucleus, lysosomes and peroxisomes while prokaryotic cells display just the opposite of eukaryotic cells. Eukaryotic cells recombines its genes by meiosis and by the fusion of gametes while the prokaryotes does by partial and undirectional transfer of DNA.</span>

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3 years ago

Read 2 more answers

Which of the followWhich of the following correctly match a convection current in an Earth system to the primary source of energ

Keith_Richards [23]

Explanation:

Looking at the Ecological concept of Modern Ecology

we have

Atmosphere, Lithosphere, Biosphere, Niche, Environment, Habitat, Population, Ecosystem and Biotic community

Hydrosphere and Geosphere are not part

so Atmosphere is the correct answer

3 0

3 years ago