Certain genes/cells are activated/turned on (how ever you want to word it)
The right answer for the question that is being asked and shown above is that: "D) The replacement of a native species of animal with an invasive species." The statement that describes an example of ecological succession is that The replacement of a native species of animal with an invasive species.<span>
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B)landform 2 is what was made by the deposition of sediments
This picture represents humoral immunity, please read through it, and if you dont understand which option is your answer then i would recommend you read more about this topic, if you want it to be done fast, you can read this http://www.s-cool.co.uk/a-level/biology/immunity/revise-it/the-third-line-of-defence
I hope you can come up with the answer on your own as it will be a good thing for you in your future exams :)
Surely i can help you if you dont understand something so just ask :D
The sickle cell anaemia is a condition, in which the red blood cells of the affected person becomes sickle shaped. This condition is caused by an autosomal recessive condition, which is a genetic disorder. Due to the sickle shaped RBC, the Hemoglobin becomes unable to bind with the oxygen efficiently, as a result it causes anaemia.
As this condition is caused by genetic abnormality, it can be detected by a DNA analysis.