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Sunny_sXe [5.5K]
3 years ago
14

In general, geographical isolation occurs when

Biology
1 answer:
Kitty [74]3 years ago
7 0

Answer:

<h2>D</h2>

Explanation:

Geographical isolation is the physical separation of two populations by geographic barriers (like by mountains, rivers, hills etc). In other words, Geographical isolation is when, organisms that are separated from exchanging their genetic material with other organisms of the same species ,

Geographical isolation occurs by adaptive radiation and allopatric speciation

As generally, geographical isolation occurs when populations are separated from each other by a distance that is great enough to limit gene flow.

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Apply the principles of diffusion to explain what will occur after placing a dyed sugar cube in a beaker of water
snow_lady [41]

The molecules in the sugar move from an area of higher concentration (sugar cube) to an area of lower concentration in the water.

That is exactly what diffusion is: the net movement of molecules or atoms driven by a gradient , which means that it doesn’t requires energy.


7 0
3 years ago
what is the difference between the closed conformation and open conformation of chromatin packing? biology
Oduvanchick [21]

The shape of chromatin, which can be either open (euchromatin) or compact (heterochromatin), is dynamically regulated during the phases of the cell cycle is the two types of conformations.

  • The main distinction between conformation and configuration is that whereas the configurations of the same molecule do not easily interconvert, their conformations do.
  • With a predefined location in the nucleus and a certain form, such as metacentric, submetacentric, acrocentric, or telocentric, chromosomes are primarily heterochromatic in this stage.
  • All DNA-mediated processes, including gene regulation, can be significantly impacted by the degree of nucleosomal packaging.
  • While heterochromatin (tight or closed chromatin) is more compact and resistant to factors that need to access the DNA template, euchromatin (loose or open chromatin) structure is permissible for transcription.

To know more about chromatin check the below link:

brainly.com/question/691971

#SPJ4

5 0
1 year ago
use the samples; diamond, dolomite, gneiss, and chalk and provide your analysis of composition and identification based on their
Trava [24]

Answer:

Diamond-

Physical identification characters:

Color-  White or Colorless

Lusture - admantine

Streak - Colorkess

Habit - Hour glass structure

Hardness - 10

Cleavage- octaheadral

Composition- pure carbon

Specific gravity-3.5

Dolomite (CaMg(CO3)2

Color - Colorless or white

Hardness is between 3-4

Reacts with any acid

Gneiss

Light and dark strip or banding present alternatively

biotite , pyroxene have Mafic mineral shows dark banding

Quartz, Feldspar have  Felsic mineral for light banding

High grade metmorphic rock which is formed due to regional metamorphism of lower grade rock

Chalk(CaCO3)

Color-White

Very fragile

Hardness-1

With acid gives effervescence.

4 0
3 years ago
Which is an immune response ?
Westkost [7]

Answer:

The immune response is your body's third line of defense. In this response, your body releases B-Cells and T-Cells to fight the antigen and destroy it.

Explanation:

Hope this helps!

8 0
2 years ago
Read 2 more answers
Which of the following situation would a state government address
Alina [70]

Answer:

The power to lay and collect taxes

The Reagan administration tried to reduce the role played by the federal government in state and local matters

Resident/nonresidents

A republican form of government for every state

Extradition

State laws and court decisions must generally be honored by other states

Exercised simultaneously by the national and state governments

4 0
3 years ago
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