When individuals in a population of the same species compete against each other for resources, it is called competition

It is called direct competition.

Explanation:

Competition arises when living organisms including animals, plants and microorganisms need limited resources to thrive in their choose environment. Competition can grouped into interspecific, intraspecific, direct and indirect competition. In direct competition same species compete directly for similar resources like mates, food, space etc. Few examples include

1. a pair of male penguin battling for a single female.

2. A pair of male lion battling for a pride.

this null effect is caused by a weak manipulation and ineffective internal validity. in a scientific study, as the one dr. morimoto is trying to perfom, internal validity refers to the confidence placed in the cause-effect relationship and to how well an experiment is done and able to eliminate confounding variables.        

speed

explanation: