Name: 
 

Gateway Practice Test No. 6



Short Answer
 

1. 

What are the raw materials (ingredients) in the photosynthesis process?
 

2. 

What are the products of photosynthesis?
 

3. 

Explain, or describe, the photosynthesis process.
 

4. 

Why is "Light Energy" written above the arrow in the formula for the photosynthesis process?
 

5. 

A human body cell has 46 chromosomes. Each daughter cell will also have 46 chromosomes. Why is that true?
 

6. 

Directions: Use the chart below to answer questions 6 through 8.
Looking at the chart below, what question were the scientists most likely trying to answer?
gateway_practice_6_files/i0070000.jpg
 

7. 

What was the manipulated variable in the experiment?
 

8. 

What might the scientists conclude from these data?
 

9. 

Directions: Use the information below to answer questions 9 through 11.
A dog breeder has begun to raise Labrador retrievers. So far, she hasn't been able to predict the color of the puppies that she breeds. She does not know that dark fur (D) is dominant over yellow fur (d).

When the breeder crossed a yellow female Labrador retriever with a male Labrador with dark fur, she expected half of the puppies to be yellow and half of the puppies to be dark. However, in a litter of 8 puppies, all had dark fur. The breeder next crossed the same yellow female with a different dark male. This time, half of the puppies were yellow and half were dark.

What letters would represent the genotype of the first male?
 

10. 

What letters would represent the genotype of the second male?
 

11. 

How can the woman breed a litter of all yellow puppies?
 

12. 

Create your own food web using the diagram below. What are the organisms in each level called and give an example of an organism for each level.
gateway_practice_6_files/i0130000.jpg
 

13. 

Directions: Use the diagram below to answer questions 13 through 15.
Identify the labeled parts of the digestive system.
gateway_practice_6_files/i0140000.jpg
 

14. 

Which (letter and name) represents the organ through which food is absorbed?
 

15. 

Which (letter and name) represents the organ in which bile is produced?
 

16. 

Classify the following organisms into the proper:  A. Kingdom, B. Group, C. Phylum.
1.gateway_practice_6_files/i0170000.jpg  2. gateway_practice_6_files/i0170001.jpg  3.gateway_practice_6_files/i0170002.jpg 4.gateway_practice_6_files/i0170003.jpg
 

17. 

Directions: Use the following information to answer questions 17 and 18.
gateway_practice_6_files/i0180000.jpg
What was Samantha's hypothesis?
 

18. 

What was Samantha's conclusion?
 

19. 

If a homozygous black guinea pig (BB) is crossed with a homozygous white guinea pig (bb), what is the probability that an offspring will have black fur?
 

20. 

If a homozygous black guinea pig (BB) is crossed with a homozygous white guinea pig (bb), what is the probability that an offspring will have white fur?
 

21. 

If a homozygous black guinea pig (BB) is crossed with a homozygous white guinea pig (bb), what is/are the genotype(s) of the offspring? Your answer should include a/the percentage(s).
 

22. 

If a homozygous black guinea pig (BB) is crossed with a homozygous white guinea pig (bb), what is/are the phenotype(s) of the offspring? Your answer should include a/the percentage(s).
 

23. 

Usually, food and energy flow from (trace the pathway):
 

24. 

What type of energy is transferred in the pathway described in the energy pyramid?
 

25. 

What is the source of energy that flows through an ecosystem?
 

26. 

Directions: Use the diagram below to answer the question. gateway_practice_6_files/i0270000.jpg
What does a food chain show?
 

27. 

How is a predator different from a scavenger?
 

28. 

Why is the flow of energy through an ecosystem considered unidirectional?
 

29. 

Why do food chains rarely exceed four consumers?
 

30. 

Why is it better for an organism to be part of a food web as opposed to a food chain?
 

31. 

The following are different kinds of heterotrophs. Give an example of each type of heterotroph and list the type of organism eaten.
Heterotroph Classification
Heterotroph
Example(s)
Type of Organism Eaten
A. Herbivore
  
B. Carnivore
  
C. Omnivore
  
D. Predator
  
E. Scavenger
  
F. Saprobe
  
 

32. 

What do food chains, food webs, and ecological pyramids illustrate?
 

33. 

How is an ecological pyramid similar to a food chain? How is it different?
 

34. 

In the following pyramid, what are the most numerous organisms? What are the least numerous organisms? Which group has the most energy? Which group has the least energy?
gateway_practice_6_files/i0350000.jpg
 

35. 

The following statements for a scientific investigation do not allow for measurable results to be obtained.Choose one of these statements and rewrite it so that measurable results could be obtained.
Statements:
A. Which brand of pizza tastes best?
B. Who is the best athlete in the world?
C. What is the most beautiful wildflower in Georgia?
 

36. 

Directions: Use the following diagram to answer the question.
gateway_practice_6_files/i0370000.jpg
Identify the structures labeled A through D. What type of cell is this?
 

37. 

What are three ways the human body gets rid of water? Which organ system is involved with each process?
 

38. 

Directions: Use the following diagram to answer the question.
gateway_practice_6_files/i0390000.jpg
What stage of mitosis is shown in the drawing 5 above?
List the stages of mitosis in the correct order.
 

39. 

Directions: Use the diagram below to answer question 39 and 40.
gateway_practice_6_files/i0400000.jpg
Identify and describe the structure at E.
 

40. 

Identify (by letter and name) the respiratory system structure that closes off  the trachea when a person swallows?
 

41. 

During DNA replication, Adenine (A) always pairs with what other nitrogen base?
During DNA replication, Guanine (G) always pairs with what other nitrogen base?
 



 
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