<span>Magma, like many other things, liquifies at high heat and it cools down and solidifies at low temperatures. Basically, while inside a volcano, magma is liquid and extremely hot and flows freely. When it bursts out, it becomes lava and starts cooling down due to the air and winds and things like that, so it starts turning into rocks and in time these rocks create new layers of the volcano. This is how many islands were formed.</span>
Answer:
<h2>A</h2>
Explanation:
1. Sickle cell anemia is an inherited condition, disorder (disease).
2. It is a recessive condition, in which red blood cell become mutated and converted to a sickle like shape, and there aren't enough healthy red blood cells to carry oxygen throughout the body.
3. This condition normally occur when, there is inheritance of two abnormal or mutated copies of the β-globin gene, one allele from each parent.
4. β-globin gene makes haemoglobin.
5. Sickle cell anemia results when glutamic acid being substituted by valine at position 6 ( in short E6V substitution).
6. So, it a single base-pair substitution in the gene encoding the beta subunit.
Answer:
A hypothesis is a possible answer to a scientific question, but it isn’t just any answer. A hypothesis must be based on scientific knowledge, and it must be logical. A hypothesis also must be falsifiable. In other words, it must be possible to make observations that would disprove the hypothesis if it really is false.
Explanation:
The correct answer is radial symmetry.
This means that there's a central axis around which they are formed, which is similar to how starfish or tulips grow. Similarly put, it's like cutting a pie or a pizza through the axis and getting the same pieces.
