I think it's A
the cell membrane contain protein molecules
I’m pretty sure the answer is A because carbon dioxide causes a solution to turn yellow and a solution that indicates no carbon dioxide would be blue instead of green.
Answer:
fixed action pattern, key stimulus; key stimulus, fixed action pattern
Explanation:
- An innate behavior which specific to a species and is highly stereotyped is termed as a fixed action pattern.
- This behavior occurs due to a neuronal network that is hard-wired in the species and the response is said to be generated following a key stimulus.
- A key stimulus is the one that generates a fixed action pattern and this is also called a releaser.
- A key stimulus can be in the form of shape, sound, color, or a combination of these.
- In this case, the red spot is a stimulus for the chicks which causes them to peck at their parent's bill, and hence, the red spot is a key stimulus, and pecking of the chicks is a fixed action pattern.
- The parents regurgitate the food only when the chicks peck at their bills, so pecking is a key stimulus for the parents which causes them to regurgitate the food which is a fixed action pattern.
For me I would have to go with C. They always have the same number and kinds of Chromosomes.
By looking at the diagram, and my knowledge of Punnett squares, i would say B. 4:16
