Hi
It is true that on the Galapagos islands Darwin observed tortoises with a dome and saddle shaped shells, you can see both in attached image.
Darwin observed that Galapagos Tortoises had the shells with different shapes depending on the Island they live, For example: The tortoises with saddle shaped shells were able to reach up to eat leaves of plants while the tortoises with dome shaped shells would not reach up and they would eat food from on ground sources. This made him think that the differences in tortoise shell is also a strong evidence that indicates that how tortoises have adapted themselves to better get their food as per the available resources and how they have evolved from same ancestral specie into two different species. This point also helped him in proposing the theory of evolution by natural selection.
Hope it helps!
Answer: The correct answer is liquid.
Explanation:
Liquid, gas and solid are the states of the matter.
Solid: In the solid, the inter molecular force of attraction is strongest. The particles are more tightly packed in this in comparison to liquid and gas. It has definite shape and volume. For example, iron.
Gas: In the solid, the inter molecular force of attraction is very less. The particles are not tightly packed in this in comparison to solid and liquid. For example, hydrogen gas.
Liquid: In the liquid, the inter molecular force of attraction is not very strong. The particles are loosely packed. It has no definite shape but has definite volume. For example, water.
Therefore, water is an example of a liquid.
<span> 1.) Collect cheek cells. 2.) Burst cells open to release </span>DNA<span>. 3.) Separate </span>DNA<span> from proteins. and debris. </span>4<span>.) Isolate concentrated .</span>
Given what we know, the three sentences in this question all describe the properties of oceanic crust.
<h3>What is the oceanic crust?</h3>
- The oceanic crust is the outer layer of the earth, located at the bottom of the oceans.
- It contains three layers, ordered by number.
- During subduction, this remains the topmost crust.
- It is formed by the solidification of magma.
- The oceanic crust is known to be very dense.
Therefore, we can confirm that the sentences in the question describe oceanic crust given that this is the topmost crust during subduction, formed by the solidifying of magma, making it a much denser rock than the other forms of crust.
To learn more about oceanic crust visit:
brainly.com/question/4617658?referrer=searchResults