Biology 425: True-False Questions- Chapters 1-7 , Complete With Answers

Biology 425: True-False Questions- Chapters 1-7

1. Evolution of Plants; p. 2; moderate; ans: T
Proteinoid microspheres provide evidence that organic molecules in water can aggregate into
cell-like structures

2. Evolution of Plants; p. 3; moderate; ans: F
The first cell-like structures were able to use inorganic (organic) compounds as a source of
energy.

3. Evolution of Plants; p. 3; easy; ans: F
Most likely, autotrophs (heterotrophs) evolved before heterotrophs (autotrophs).

4. Evolution of Plants; p. 4; easy; ans: T
According to the fossil record, the appearance of photosynthetic organisms was associated with
an increase in free oxygen in the atmosphere.

5. Evolution of Plants; pp. 4–5; moderate; ans: T
The increase in atmospheric oxygen enabled organisms to obtain more energy from organic
molecules by breaking them down via respiration.

6. Evolution of Plants; p. 5; easy; ans: F
Eukaryotic (Prokaryotic) cells evolved before prokaryotic (eukaryotic) cells.

7. Evolution of Plants; p. 5; easy; ans: T
Archaeans are a group of prokaryotes.

8. Evolution of Plants; p. 5; moderate; ans: F
Carbon dioxide (Essential minerals) is the limiting factor for plant growth in the seas.

9. Evolution of Plants; p. 5; moderate; ans: T
As multicellular organisms evolved in coastal environments, food-conducting tissues developed
to connect photosynthesizing and nonphotosynthesizing body parts.
10. Evolution of Plants; p. 6; moderate; ans: T
In plants, water moves in a continuous stream from roots to stems to leaves.

11. Evolution of Plants; p. 6; moderate; ans: F
Stomata are specialized guard (epidermal) cells in the epidermis of leaves.

12. Evolution of Plants; p. 6; easy; ans: T
Plants that contain xylem and phloem are called vascular plants.

13. Evolution of Plants; p. 6; easy; ans: F
Primary (Secondary) growth results in a thickening of the stem and root.

14. Evolution of Plants; p. 6; difficult; ans: T

, A plant must first exhibit primary growth before it can exhibit secondary growth.

15. Evolution of Communities; p. 7; difficult; ans: F
An example of an ecosystem (Fresh hydro ecosystem : All the components are designed to
survive in fresh water. Algae , water snails, talapi fish, fish eagle.) is a tree and all the animals
that live on and in it.

16. Evolution of Communities; p. 9; moderate; ans: F
In an ecosystem, elements and energy (added constantly) are recycled.

17. Evolution of Communities; p. 9; moderate; ans: F
The oxygen released by photosynthesis is required by heterotrophs, but not (and) by autotrophs,
for energy-producing metabolic activities.

18. Appearance of Human Beings; p. 11; easy; ans: T
One effect of chlorofluorocarbons has been to deplete the ozone layer.

True-False Questions

1. Introduction; p. 15; easy; ans: T
Only six elements make up 99 percent of the weight of all living matter.

2. Organic Molecules; p. 15; moderate; ans: F
All organic molecules contain carbon, hydrogen, and oxygen.

3. Carbohydrates; p. 16; easy; ans: F
Pentoses and hexoses have a carbonyl (hydroxl) group in the ring form but not the chain form.

4. Carbohydrates; p. 17; easy; ans: F
Plants break down their carbohydrate (starch) reserves and transport starch (monosaacs and
disaacs) to the site where it is needed.

5. Carbohydrates; p. 17; easy; ans: T
Starch and glycogen consist of alpha-glucose subunits, whereas cellulose is made up entirely of
beta-glucose.

6. Carbohydrates; p. 18 moderate; ans: T
Pectins and hemicelluloses constitute the matrix of the plant cell wall in which cellulose
microfibrils are embedded.

7. Lipids; p. 19; easy; ans: F
In contrast to unsaturated fatty acids, saturated fatty acids have one or more (no) kinks that
prevent close packing.

8. Lipids; p. 20; moderate; ans: T
In a phospholipid, the phosphate group is attached directly to the glycerol backbone.