Answer:
Describes ecosystem homeostasis
Explanation:
Answer:
frog
Explanation:
frogs live their first part of their lives in water so they need gills but after metamorphosis they live on land so they need lungs.
Answer:
Question Answer
Inquiry This is the act of trying to find the answer to an unknown question by the use of experimentation and research.
Investigation This is the process of researching or studying a concept. Examination, inquiry
Explanation:
Answer: the correct answer is d. all of the above must happen for defecation to occur.
Explanation:
In response to the distention of the rectal wall, the receptors send sensory nerve impulses to the sacral spinal cord. Motor impulses from the cord travel along parasympathetic nerves back to the descending colon, sigmoid colon, rectum, and anus. The resulting contraction of the longitudinal rectal muscles shortens the rectum, thereby increasing the pressure within it. This then opens the internal sphincter.