u Iy khow already. If not, read around the answer in the book so you understand
ID: 140234 • Letter: U
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u Iy khow already. If not, read around the answer in the book so you understand the answer. Consider the completed document a study guide of terms for the exam. Chapter 1 Themes of Biology 1.1 The Cell: An Organism's Basic Unit of Structure and Function Which cells lack membrane-enclosed org anelles? (7) Which cells are smaller? Prokaryotic or eukaryotic cells (7) 1.2 Tree of Life Which two DOMAINS of life consist of prokaryotic cells? (12) uist the four divisions of the Eukarya domain. (13) Name that kingdom of Eukarya that includes humans. (13) Eukarya called protists are less closely related to other then they are to plants, animals or fungi. (13) 1.3 Experimental Variables and Controls & Theories in Science A hypothesis must be testable? (18 A hypothesis can be proven? (18) (20) A controlled experiment compares the experimental groupfs) to the Which variable is menipulated by the researchers? (21) Which variable is measured during the experiment? (21) What are the three basic differences between a hypothesis and a theory? (21) Chapter 2 Chernical Context of Life 2.1 Matter Consists of Chemical Elements which four elements make up 96% of living matter? (29)Explanation / Answer
1.1.
Prokaryotic cells lack membrane enclosed organelles.
Prokaryotic cells are smaller than eukaryotic cells. They have size range of 0.1 - 5µm and 10- 100µm respectively.
1.2.
Prokaryotic organisms belong either to the domain Archaea or Bacteria; organisms with eukaryotic cells belong to the domain Eukarya.
Four divisions of Eukarya domain are: Protista, Fungi, Plantae, and Animalia
The kingdom of Eukarya that includes human is Animalia.
Eukarya called protists are less closely related to other eukaryotic cells then they are to plants, animals or fungi.
1.3.
A hypothesis is a uncertain statement that proposes a promising explanation to some phenomenon or event. A useful hypothesis is a testable statement, which may include a prediction it should not be confused with a theory.
We can never test all alternatives therefore a hypothesis can never be proven.
A controlled experiment compared the experimetal group(s) to the control group.
The variable which can be manipulated is called independent variable.
The variable which is measured in experiment is called dependent variable.
A hypothesis is an idea or thought about what is going to happen before an experiment starts which a theory is conclusion after a number of experiments. A theory is always supported by evidence while hypothesis is only suggested possible outcome. A theory is well tested and hypothesis must be testable.
2.1
Carbon, hydrogen, oxygen and nitrogen are the four elements that make up 96% of all living matter.
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