Answer:
limiting factors
Explanation:
The ecological optimum represents the value of the factors within the ecological valence at which the life processes of a species take place best. The upper and lower limits of an ecological valence are its maximum and minimum. Beyond these limits, physiological processes are interrupted and death occurs.
Answer: Shivering
Explanation:
Homeostasis is the body ability to maintain the internal conditions stable and constant with respect to the changes occurring in the external environment. Shivering is a response shown by the body with respect to external cold environment. It is a tendency of the body to maintain it's internal temperature constant. It is the way by which the body produces heat to survive in cold weather conditions.
The answer is the first one: “...attract each other.”
Archaeopteryx had "teeth, three claws on each wing" similar to dinosaurs. So, most appropriate answer would be Teeth & Wings
Hope this helps!
