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Volgvan
3 years ago
6

Native mammals found in Australia are marsupials. There are no naturally occurring placental mammals, which suggests that Austra

lia broke away before placental mammals evolved. Which geological theory explains this phenomenon?
Biology
2 answers:
Reptile [31]3 years ago
5 0
I’m not certain, but I believe it is continental drift
solmaris [256]3 years ago
3 0

Answer:

The Continental drift theory

Explanation:

The Marsupials are the mammals that are mostly found in Australia and America and are characterized by the presence of a pouch that is attached to their body.

These mammals evolved from the reptiles and present abundantly in the Cenozoic era, after the extinction of dinosaurs. But they first appeared during the time of existence of dinosaurs. The continents of Australia and America eventually got separated before the naturally occurring placental mammals could evolve. This suggested a piece of evidence for the continental drift theory.

This theory describes that the continents float across the large oceans from one place to another with respect to the fixed poles.

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Answer:

The animal cell will shrink due to loss of water to the external solution

Explanation:

An isotonic solution is that solution which has equal concentration with its external environment. Hence, no net movement of water occurs in an isotonic solution since there is no concentration gradient. Therefore, if an animal cell is placed in an isotonic solution at first, no net movement of water occurs because the intracellular and extracellular concentrations are at equilibrium.

However, if more solutes are added to the solution, it makes the solution HYPERTONIC to the cell i.e greater in concentration. This creates an osmotic gradient and causes water to move out of the animal cell into the solution in accordance to osmotic principles (movement of water from a low concentration of solute to high concentration of solute). This causes the animal cell to likely SHRINK.

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2 years ago
What is a good description of Badwater Basin
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3 years ago
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Nucleotides lining up along the template strand according to base pairing rules process helps to preserve the genetic information stored in DNA during DNA replication

Option D

<h3><u>Explanation:</u></h3>

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During protein synthesis, same nitrogen bases get denoted in the RNAs and this gives the particular protein which is required in the body.  No molecule present in the body can destroy the DNA and its alignment. It’s conserved as long as no external molecule or force destroys it. So it’s conserved in a very safe way.  

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