Answer:
The nervous system regulates the speed at which food moves
through the digestive system. It also alerts people of when they
are hungry.
Explanation:
For God's sake I need that quick response.
Replace as letters in parentheses with words that correctly complete sentences.
The water and salts are emitted by (A) form a liquid called (B).
This liquid is transported through a system of tubes, from (C) to (D).
The plant then have sugars, which will be part of a sap, called (E).
This sap is carried by a system of tubes, called (F), to the too many parts of the plant.
The behavior that is reinforced is coming to the door. the dog learns to go to the door because that's what it was rewarded for doing
So, if the owner stays at the door, the dog will saw the situation and understand he needs to stay inside. If the owner goes outside, the dog will imitate and when rewarded he understands it's a thing to do.
The possible combinations are as follows
R r
R RR Rr
r Rr rr
so you would have a ratio of 1RR : 2Rr : 1rr