<span> overvalue their physical appearance, weight, and body shape. </span>
Based on the description of events, being that the lizard population appears to increase as soon as the snake population decreases, it appears that the snakes prey on the lizards. This suggests that the snake is a keystone species. A keystone species is one that has a dramatic effect on maintaining the balance of an ecosystem. As soon as the snake population decreases, major changes occur to the ecosystem, such as the lizard population increasing.
Therefore, the answer is D: <span>The snake is a keystone species in the ecosystem.</span>
I think the correct answer from the choices listed above is the last option. The control group to be used to test the hypothesis would be the swallows with average-length tails. A control group <span>is defined as the </span>group<span> in an experiment or study that does not receive treatment by the researchers.</span>
Option A. Bipolar disorder differs from schizophrenia in that schizophrenia typically involves hallucinations.
What is bipolar disorder?
- Bipolar disorder, previously known as manic depression, is a mood disorder characterized by periods of depression and periods of abnormally-elevated happiness that last from days to weeks each.
- If the elevated mood is severe or associated with psychosis, it is called mania; if it is less severe, it is called hypomania.
What is schizophrenia?
- A disorder that affects a person's ability to think, feel, and behave clearly.
- The exact cause of schizophrenia isn't known, but a combination of genetics, environment, and altered brain chemistry and structure may play a role.
What is hallucination?
- A perception of having seen, heard, touched, tasted, or smelled something that wasn't actually there.
- Hallucination can have causes that aren't due to underlying disease. Examples include drug intoxication.
To know more about hallucination, refer:
https://brainly.ph/question/10808859
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