Answer:
so that the genetic variations are not directly exact
Explanation:
Answer:
A. amount of food available
Explanation:
An experiment consists of two types of variables, independent and dependent. Value of independent variable is decided by the person doing the experiment and is independent of experimental conditions. Value of dependent variable is dependent on the independent variable. It can not be altered by the person doing experiment.
Here, it is given that mice receive variable amount of food each day and their lifespan is recorded. Since the amount of food is decided already it is the independent variable. The lifespan is expected to depend on the amount of food hence it is the dependent variable.
Answer:
carrying capacity
Explanation:
<em>The leveling off is an indication of the carrying capacity of the environment.</em>
<u>By definition, the carrying capacity of an environment is the total number of organism of particular species that an environment can support given the resources it has.</u>
When a particular species of organism is introduced into a new environment, it first of all spend some time trying to adjust to this new environment and this time is characterized by little population growth.
After successfully adjusting and getting acclimatized to the new environment, the population of the organism experiences a sharp rise and then levels off as the maximum population size the environment can support based on the resources it has is reached. This jund of population growth is referred to as logistic growth.
The population of the organism fluctuates a little bit around the carrying capacity based on several factors, especially competition for resources.