A. once defined, an ecosystem is a unit scientists can analyze.
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.
The bryophytes are simple plants and not well adapted to terrestrial life. They are plant species that reproduce using spores. In bryophytes, the long-lived and noticeable generation is the gametophyte. Plants belong to Class Bryophyta do not have true stems, roots, and leaves.
This will result in an incomplete amino acid that will cause the function of the protein to change and also the shape of the protein to change.
