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Penn Foster Biology Review
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Penn Foster Biology Review
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25 Questions

1. Testing has identified an autosomal recessive disorder in which the red blood cells are misshapen and irregular. This person probably suffers from

2. The most common bryophytes include

3. During a scientific experiment, the control group is

4. What factor is considered part of a population's demographics?

5. In the electron pathway for light reactions in photosynthesis, PS II involves

6. Urine is formed in the

7. A detrital food web begins with

8. The hard body parts of insects and crabs are composed of a polysaccharide called

9. ( ) is a secondary form of xylem that builds up year after year

10. The skull, the ribs, the vertebrae, and the sacrum are parts of the ( ) skeleton.

11. The structure that allows humans to speak is the

12. Which of the following is a postzygotic isolating mechanism?

13. In meiosis, the exchange of genetic material between nonsister chromatids occurs during

14. The cell-to-cell junctions that allow cells to communicate are called ( ) junctions

15. octet rule

16. The ( ) are sometimes called the 'powerhouses' of this cell

17. Sympatric speciation may occur in plants due to

18. Complete this analogy: Cells are to tissues as organs are to

19. Commercially grown tomatoes are often ripened by treating them with

20. The gene for ( ) has been used to create larger fish and rabbits

21. In general, a cell-signaling pathway begins when

22. The ( ) bond is s type of atomic bond in which atoms share electrons to produce a completed outer shell

23. In vascular plants ( ) conducts water and minerals, while ( ) conducts organic nutrients

24. With respect to the regulation of population growth, what factor is a density-independent factor?

25. The ( ) keep(s) the cytoplasm of eukaryotic cells separate from the DNA

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