Hox genes are: Hoxd9,10,11,12 and 13. Hox genes are responsible for limb bud formation. Hoxd9 influences thumb, Hoxd9 and 10 index fingers and so on.
Hoxd10 has ectopic effect on the development of the mouse limb bud index finger. As a consequence index finger in formed in place of thumb.
So all we know is that the student stated something ("<span>if plants are added to an indoor environment the air quality will improve
"). This is only a statement - it's not a test whether this statement is true yet.
So the correct answer is: it is a hypothesis.
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When a stimulus is produced it signifies the production of sensation in the sensory organs. This sensation through the sensory organs (eyes, ears, nose, skin and tongue) is sent to the sensory nerve connected to these sense organs. These sensory nerves send nerve impulses through the nerve fiber to the spinal cord. From the spinal cord the nerve impulse is transferred to motor nerves.
The motor nerve then sends response to the stimulus though the same path to the region from which stimulus was received and thus the body responds through muscular activity. Such as removal of heat from the heated object if heated sensations were received.
C. Place in the food web
Habitat only refers to the natural home or environment of an organism
