Chapter 1: Themes in Biology and Scientific Inquiry

Question 1

Differentiate between ecosystems and communities

Answer 1

Ecosystems: living+non-loving in an area
Communities: all living things in an area

Question 2

What are organelles?

Answer 2

functional and structural components of a cell

Question 3

What is a cell?

Answer 3

functional and structural fundamental unit of life. Also the smallest combination of molecules that can multiply autonomously in a stubble environment.

Question 4

Levels of Organization order

Answer 4

Biosphere-> Ecosystems-> Communities-> Populations-> Organisms-> Organs-> Tissues-> Cells-> Organelles-> Molecules

Question 5

The Scientific Method order

Answer 5

Observation-> Scientific question-> Hypothesis -> Prediction(pre test)-> Testing/experimentation with controls-> (first data analysis) Results-> Conclusion-> Theory

Question 6

Are domains Bacteria, Archaea and Eukarya genetically related and do they undergo natural selection?

Answer 6

• Yes(common ancestor), but domain Archaea and Eukarya are more closely related than any of them are to Bacteria.
• Also yes.
  Bacteria and Archaea(proks): horizontal gene transfer
  Eukarya:mutations

Question 7

How does DNA encode information?

Answer 7

information is encoded in the sequence of nucleotides

Question 8

Is it possible to test hypothesis without experimentation?

Answer 8

yes, like in the case of historical events

Question 9

What’s an independent variable?

Question 10

What’s a dependent variable?