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2 years ago

What are blocks of time in the geological time scale called?

Biology

2 answers:

Ksivusya [100]2 years ago

5 0

The blocks in the geological time scale are: Eons , Era , and Periods

Mnenie [13.5K]2 years ago

4 0

Answer:

The block o time in the geological time scale are called:

Eon: The biggest ones

Eras: Which are the middle ones

Periods: Which are the smallest ones.

Explanation:

The geological time scale classifies the lapses of time in different gradients. It does it like that to optimize the retrieval of data and locate the objects and phenomenons of study to analyze them and conduct the research in an organized way. Eons are classified in Archean, Proterozoic, and Phanerozoic. Eras are classified in: Early archean, middle archean, late archean, Early proterozoic, Middle proterozoic, late proterozoic, Paleozoic, Mesozoic, Cenozoic. Periods are classified in Cambrian, Ordovician, Silurian, Devonian, Mississippian, Pennsylvanian, Permian, Triassic, Jurassic, Cretaceous, Tertiary, Quaternary.

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Which describes how a centrifuge separates a mixture? It spins a sample to separate based on density. It spins the sample to sep

Kazeer [188]

The answer is: It spins a sample to separate based on density.

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2 years ago

Check all locations where a pulse can be taken.

yulyashka [42]

Answer:

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Explanation:

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Have a nice day!

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- Heather

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2 years ago

Read 2 more answers

If someone with auburn hair has children with someone with red hair (but whose mother had black hair ) what are the genotype and

tensa zangetsu [6.8K]

The phenotype is - 75 % red and 25 %brown.

The genotype is hRhR - 25%

hBkhR - 50%

hBrhBk - 25%.

<h3>Explanation:</h3>

The cross given here is a simple dominant - recessive relationship between the three types of alleles of hair colour. The genes of this characteristics are present in autosomes, so will be segregated equally among all the sexes of the offsprings.

Now the genotype of auburn and red with black mother is given. So during gametogenesis, the gametes from the parents will be

Father - hBr and hR

Mother - hBk and hR

So, the probable combinations are hBrhBk, hBrhR and hBkhR.

The frequency of the combinations are 25%, 25% and 50% respectively.

The phenotypic ratio will be red : brown as 3:1.

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3 years ago

There are two species of freshwater shrimp that are introduced to a pond. The first species, Caridina cantonensis, is brightly c

Marina86 [1]

Explanation:

Natural selection is the mechanism that is responsible for the evolution of organisms.

In the given case, the Freshwater shrimp has been introduced to a pond in which the two species with variations are introduced.

The C. cantonensis is brighter in color whereas the C. multidentata is mottled drab in color. The predator fish can feed easily on the species which is brighter therefore C. cantonensis is more susceptible. The mottled drab species is not easily predated by the species.

The 30 % offsprings of C. cantonensis can survive till the reproductive age whereas 75% of C. multidentata. This shows that natural selection has acted on the color of the shrimp species selected against the predator fish species.

The species with mottled drab color is the result of the differential reproductive rate.

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2 years ago

Suggest where a biologist could isolate the enzyme reverse transcriptase from.

lidiya [134]

Chemical Laboratories

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3 years ago