1. Proficiency Review
Biology

2. Prelesson Quiz An energy pyramid is represented below.
1. Which of the following number sequence represents the flow of available energy from the base of the pyramid to the top of the pyramid in the ecosystem represented above?
a. 100–100–100–100
b. 100–75–50–25
c. 100–50–25–0
d. 100–20–5–1

3. Which one of the following does NOT explain why there is a decrease in energy through the trophic levels in an ecosystem?
a. There is an increase in biomass as trophic levels decrease.
b. Energy is lost as organisms grow older over time.
c. There is an increase in the number of individuals as trophic levels decrease.
d. Energy is lost from the processes of respiration and metabolism.

4. 3. Use the desert food web below to answer the following question.
Two of the primary consumers in the desert environment are
a. coyote and rattlesnake
b. grass and cactus
c. rabbit and grasshopper.
d. hawk and coyote.

5. In the diagram below, Cell I and II represent typical cells.
4. In both cells, organelle 5 is the site of
a. photosynthesis .
b. cellular respiration.
c. resource storage.
d. protein synthesis.

6. 5. When gametes are produced from a parent cell during normal meiosis, which of the following describes the number of chromosomes in each cell resulting from this process?
Each resulting gamete has
the same number of chromosomes as the parent cell.  
twice the number of chromosomes as the parent cell.  
one-half the number of chromosomes as the parent cell.  
one-fourth the number of chromosomes as the parent cell.

7. Activity 1 (15 minutes) Cell Organelle Matching Game
Students will get in groups of 2 or 3.
Match the picture of the organelle to the function.
3. Review answers as a group.

8. 1= N 2= L 3=J 4= O 5= A 6= K 7= F 8= H 9= M 10= E 11= I 12= C 13= P 14= G 15= B 16= D

9. Activity 2 (10 minutes)
Ecology Review – Food Chains As a class, review the following diagrams and answer the questions.

10. Ecology Review – Food Web
As a class, review the following diagrams and answer the questions.

11. Biotic or Abiotic? the sun

12. Abiotic the sun

13. Biotic or Abiotic? water

14. Abiotic water

15. Biotic or Abiotic? A tree

16. Biotic A tree

17. Biotic or Abiotic? Leather

18. Biotic Leather

19. Energy Flow Energy flows when organisms eat
Grass provides energy
for the cow
The cow provides energy for us
We get energy from the cow.

20. The energy flows from the grass to the cow to us
The energy flows from the grass to the cow to us. Grass--- Cow--- Human The arrows show which way the energy is flowing.

21. Activity 3 (10 minutes) Human Body Systems
Cells-> tissues-> organs-> organ system-> organism
Cells are the basic unit of life. Somatic cells are body cells (all the cells in an organism except the sex cells). Sex cells are known as gametes (example: sperm and egg)
Tissue is a collection of cells that are similar in structure and that work together to perform a particular function.
An organ consists of various tissues that work together to carry out a specific function. Groups of organs interact to form an organ system. For each organism to survive the organ systems must work together.
Complete Human Body Systems
Students will match the organ system name to the function
Review answers as a group

22. Human Body System Match
Write the name of the correct system on the space provided. You will use each system once.
Skeletal Muscular Integumentary Circulatory Respiratory Immune Digestive Excretory Nervous Endocrine Reproductive
___________________ 1. carries air into and out of lungs, where gases are exchanged
____________________2. provides protection against infection and disease
____________________3. eliminates waste; maintains water and chemical balance
____________________4. controls and coordinates body movements and senses;
controls consciousness and creativity
____________________5. provides structure; supports and moves trunk and limbs;
moves substances through body
____________________6. protects against pathogens; helps regulate body temperature (skin)
____________________7. transports nutrients and waste to and from all body tissues
____________________8. stores and digests food; absorbs nutrients; eliminates wastes
____________________9. produces offspring
____________________10.. provides structure; supports and protects internal organs
___________________11. Maintains homeostasis; regulates metabolism and water
balance, growth and sexual development, and reproduction (hormones)

23. Answers to Human Body System Match
1.Respiratory
2. Immune
3. Excretory
4. Nervous
5. Muscular
6. Integumentary
7. Circulatory
8. Digestive
9. Reproductive
10. Skeletal
11. Endocrine

24. Mutations Mutations are changes in DNA.
Mutations can be caused by environmental factors (mutagens) such as radiation, drug exposure, and viruses.
Mutagens may cause mutations in both somatic cells and sex cells.
Mutations can also occur by chance.
Mutations in sex cells can be passed on to offspring.
Mutations in body cells cannot be passed on to offspring.

25. Mutation Questions
Within an individual rabbit, four different mutations occurred in different genes, located in different cells, as shown in the table below.
Which of these mutations could be passed on to the rabbit’s offspring?
Cell Type
Trait
Normal
Mutation
Skin
Fur Color
Black Fur
White Fur
Gamete
Eye Color
Brown Eyes
Blue Eyes
Muscle
Fur Thickness
Thick Fur
Thin Fur
Nerve
Tail Length
Long Tail
Short Tail

26. Mutation Questions
Gametes are sex cells and mutations in sex cells can be passed to offspring.
Cell Type
Trait
Normal
Mutation
Skin
Fur Color
Black Fur
White Fur
Gamete
Eye Color
Brown Eyes
Blue Eyes
Muscle
Fur Thickness
Thick Fur
Thin Fur
Nerve
Tail Length
Long Tail
Short Tail

27. can be inherited because the DNA mutation is in a somatic cell.
Ionizing radiation can damage DNA molecules by causing mutations. If DNA damage from ionizing radiation occurs in blood tissue it
can be inherited because the DNA mutation is in a somatic cell.
can be inherited because the DNA mutation is in a gamete cell.
cannot be inherited because the DNA mutation is in a somatic cell.
cannot be inherited because the DNA mutation is in a gamete cell.

28. c. cannot be inherited because the DNA mutation is in a somatic cell.
Ionizing radiation can damage DNA molecules by causing mutations. If DNA damage from ionizing radiation occurs in blood tissue it
c. cannot be inherited because the DNA mutation is in a somatic cell.
Blood cells are somatic or body cells and somatic cell mutations cannot be passed to offspring.

29. Postlesson Quiz An energy pyramid is represented below.
1. Which of the following number sequence represents the flow of available energy from the base of the pyramid to the top of the pyramid in the ecosystem represented above?
a. 100–100–100–100
b. 100–75–50–25
c. 100–50–25–0
d. 100–20–5–1

30. d. 100–20–5–1
A pyramid of energy shows rates of production rather than standing crop. Once done, the figure would have the characteristic pyramid shape . Grass populations can double in a few weeks, whereas the grasshoppers that feed on them reproduce more slowly and might double in numbers in a few months, and the mice feeding on grasshoppers might only reproduce once or twice a year. Thus, a pyramid of energy takes into account the turnover rate of the organisms, and can never be inverted.

31. Which one of the following does NOT explain why there is a decrease in energy through the trophic levels in an ecosystem?
a. There is an increase in biomass as trophic levels decrease.
b. Energy is lost as organisms grow older over time.
c. There is an increase in the number of individuals as trophic levels decrease.
d. Energy is lost from the processes of respiration and metabolism.

32. b. Energy is lost as organisms grow older over time.
The age of an organism does not effect the amount of energy in an ecosystem.

33. 3. Use the desert food web below to answer the following question.
Two of the primary consumers in the desert environment are
a. coyote and rattlesnake
b. grass and cactus
c. rabbit and grasshopper.
d. hawk and coyote.

34. rabbit and grasshopper.
Both the rabbit and the grasshopper feed on producers (plants) making them primary consumers.

35. In the diagram below, Cell I and II represent typical cells.
4. In both cells, organelle 5 is the site of
a. photosynthesis .
b. cellular respiration.
c. resource storage.
d. protein synthesis.

36. b. cellular respiration. Organelle #5 is the mitochondria
b. cellular respiration. Organelle #5 is the mitochondria. This is where cellular respiration occurs.

37. 5. When gametes are produced from a parent cell during normal meiosis, which of the following describes the number of chromosomes in each cell resulting from this process?
Each resulting gamete has
the same number of chromosomes as the parent cell.  
twice the number of chromosomes as the parent cell.  
one-half the number of chromosomes as the parent cell.  
one-fourth the number of chromosomes as the parent cell.

38. one-half the number of chromosomes as the parent cell.  
Gametes or sex cells have ½ the number of chromosomes as the parent cell.

39. Homework
1. Graph 1: Rabbits Over Time
a. The graph shows a _____________ growth curve. b. The carrying capacity for rabbits is _______________ c. During which month were the rabbits in exponential growth?

40. Graph 2: Average Toe Length
In 1800, about how many people surveyed had a 3 cm toe? _________ How many in 2000? _________ b. In 2000, what is the average toe length? ________ What is the average toe length in 1800 _____________

41. Graph 3: Mexico and US
In Mexico, what percentage of the population is between 0-4 years of age? ________ In the US? _______ b. Which age group has the smallest number in both countries? _______