Answer: The gasoline
Explanation: Gasoline is potential chemical energy because it is only used when the car is in use. It becomes kinetic when the car is on.
Answer:
A. decrease by half.
B. stay the same.
C. double.
Explanation:
Host-pathogen models resembels the host-parasite models and predator-prey which is used to evaluate the evolutionary strategies of pathogens.
The host-vector-pathogen system can be demonstarted as a change in the number of 4 types of people: healthy hosts, uninfected vectors, infected hosts, and infected vectors.
The threshold density should decrease by half, stay the same, or double, according to the standard host-pathogen model, if the combined death and recovery rate from a disease doubles, and the ability of the disease to spread from infected to uninfected persons.
Hence, the correct options are A. decrease by half, B. stay the same, and C. double.
The observers is based only on an experiment
You test a hypothesis by carrying out an experiment.
