Double and single strands
Answer:
Higher speed and more weight car applied more force.
Explanation:
Bumper cars will win in a collision because these cars have a very tough front that easily drag opposite car and receive less damage. If the weight of the car is great and speed is high as compared to the opposite car so the car will easily drag another car after collision because the car having more weight and higher speed has applied more force on the opposite vehicles.
Answer: commensalism
Explanation: commensalism is a type of association between organisms.in this association,one organism benefits and derives nutrition from the other.the other organism is neither harmed nor gains anything.
this is compared to parasitism where one organism benefits and the other is harmed.it is compared to mutualism,where both organisms involves benefits.
In the case of the question,the birds derives nutrition from the activity of the ant and the ant is undisturbed by the birds