Match the definition/description of each. a. Non-living part of the environment
b. Connects two different water molecules together
c. Organic chemicals resistant to environmental degradation
d. Cells with a nucleus and other membrane bound organelles -
e. The part of a solution that does the dissolving
f. Cells without a nucleus
g. Holds hydrogen and oxygen atoms together in one water molecule
h. Eaten by primary consumers
i. Living part of the environment
j. An intimate association between two or more organisms

1. Hydrogen bond
2. Abiotic
3. Biotic
4. Prokaryote
5. Primary Producer
6. Solvent
7. Symbiosis
8. Polar covalent bond
9. Persistent organic pollutant
10. Eukaryote

Which statements best describe the differences or similarities between a comparative investigation and an experimental investigation? check all that apply. experimental investigations are best for showing cause-and-effect relationships, while comparative investigations do not necessarily show this type of relationship. comparative investigations are often impractical and unrealistic, while experimental investigations are the most practical and realistic kinds of investigations. comparative investigations allow for the use of a wide range of variables but do not have a control group, while experimental investigations involve variables that can be controlled. both experimental investigations and comparative investigations are designed to answer scientific questions. both experimental investigations and comparative investigations focus on making observations rather than collecting new data.