Answer:
A predator is an organism that eats another organism. The prey is the organism which the predator eats.
Some examples of predator and prey are lion and zebra, bear and fish, and fox and rabbit.
An antigen causes the body to make antibodies.
<u>Answer:</u>
Nature consists of both the organism and the environment. The relationship between them are intertwined. Organisms are mainly divided into three
a) The producers
b) The consumers
c) Decomposers
These three organisms are interlinked with each other. Without them there is no existence of the environment. The producers produce the food, the consumers consume them and the decomposers decompose and release it in the form of energy. In each cycle energy is released and absorbed. The balance in the environment is maintained by the food pyramid.
Answer:
intensity with which the rats pressed the lever
Explanation:
In research, there are two main variables which are <u>dependent</u> or <u>independent</u>.
Independent variables are controlled or manipulated by the experimenter and the independent variable in this experiment is the amount of light exposure.
The response or outcome, which is then measured is the dependent variable. In this experiment, the dependent variable is the intensity with which the rats pressed the lever with varying exposure to light.
In summary, the independent variable has a causal effect on the dependent variable so in this experiment the amount of light exposure has a casual effect on whether the rats would press a lever more.
