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Multiple Choice Identify the letter of the choice that best completes the statement or answers the question.
		Animal Length of digestive system Diet category Animal weight Koala 305 cm herbivore 10 kg Dog 135 cm carnivore 11 kg Rabbit 272 cm herbivore 9 kg Bobcat 145 cm carnivore 12 kg
A B C D	1.	Herbivores are animals that eat plants. Carnivores are animals that eat other animals. The table shows data about several herbivores and carnivores. What conclusion can you draw from the data? a. There is no correlation between diet and length of digestive system. b. Herbivores have longer digestive systems than carnivores. c. Carnivores have longer digestive systems than herbivores. d. The length of the digestive system is related to the weight of an animal.
A B C D	2.	How many carbon atoms are in this nucleotide? a. 4 c. 7 b. 5 d. 9
A B C D	3.	Which of the following pairs of terms are NOT closely related? a. RNA-DNA c. carbon-codons b. proteins-amino acids d. genes-chromosomes
		First Base in Codon Second Base in Codon Third Base in Codon A A G T C   phenylalanine serine tyrosine cysteine A phenylalanine serine tyrosine cysteine G leucine serine stop stop T leucine serine stop tryptophan C G leucine proline histidine arginine A leucine proline histidine arginine G leucine proline glutamine arginine T leucine proline glutamine arginine C T isoleucine threonine asparagine serine A isoleucine threonine asparagine serine G isoleucine threonine lysine arginine T methionine (start) threonine lysine arginine C C valine alanine aspartate glycine A valine alanine aspartate glycine G valine alanine glutamate glycine T valine alanine glutamate glycine C
A B C D	4.	A codon consists of the bases adenine, guanine, and cytosine in that order. Based on the table above, which amino acid is represented by this codon? a. cysteine c. serine b. phenylalanine d. tryptophan
A B C D	5.	Based on the table above, what is the second nitrogen base in the codon that represents the amino acid methionine? a. thymine c. guanine b. adenine d. cytosine
A B C D	6.	Which of these processes does NOT require DNA replication? a. mitosis c. cell division b. meiosis d. cell growth
A B C D	7.	Why is an mRNA molecule important to the cell? a. It is the genetic information of the cell. b. This complementary copy of genetic information can leave the nucleus while the master copy stays within the nucleus. c. A molecule of mRNA contains uracil rather than thymine. d. It brings amino acids to the ribosomes so that they can be assembled into proteins.
A B C D	8.	Using the art above, what is the genotype of each parent? a. WW; Ww c. Ww; Ww b. Ww; ww d. WW; WW
A B C D	9.	Using the art above, what are the phenotypes of the offspring? a. all long wings c. mostly long wings b. all short wings d. half short and half long
		Diphtheria is a highly infectious disease of the respiratory tract that most often affects children. The cause of the disease is an aerobic bacillus that forms V-shaped arrangements. In the early 1900s, diphtheria was one of the leading causes of death in infants and children in the United States and many other countries. In the 1940s, infants and children in the United States were regularly immunized against this disease. In the late 1980s, only two dozen or so cases of diphtheria were reported in the United States. A toxoid is now given in 2 or 3 doses, about one month apart, to infants between the ages of three and four months. A booster injection is given about a year later. Childhood boosters are also given in most cases.
A B C D	10.	Based on the statement above, which of the following best describes the bacterium that causes diphtheria? a. rod-shaped organism that needs oxygen b. spiral-shaped organism that forms clusters c. round cell that affects the digestive system d. grapelike cell that does not use oxygen
A B C D	11.	What is the mass of the object being measured in the figure? a. 47.52 g c. 407.52 g b. 147.52 g d. 527.40 g
A B C D	12.	Using the art above, which of the following statements is true? a. A Celsius degree is larger than a unit on the Kelvin scale. b. A Celsius degree is smaller than a unit on the Kelvin scale. c. A Celsius degree is the same size as a unit on the Kelvin scale. d. Zero on the Celsius scale is the same as zero on the Kelvin scale.
		A school implemented a peer-study group with one class of students to determine how it affected their science grade. The school had four grading periods. The average science grades of the students who participated in the study program were recorded for each grading period. The table below shows the results. Average Grade of Students in Study Program Grading Period Average Science Grade First 81 Second 85 Third 86 Fourth 89
A B C D	13.	Which statement best describes how the school might better analyze the impact of the study program? a. Compare the results to the grades of students who did not participate in the study program. b. Compare the history grades of students who participated in the program to their science grades. c. Examine the topics studied in the science class. d. Interview students who did not participate in the program.
A B C D	14.	Which of the following is the larger classification of organisms? a. Species c. Family b. Genus d. Order
A B C D	15.	A student is viewing some cells under a microscope. How might she determine whether they are plant or animal cells? a. Animal cells are larger than plant cells. c. Only plant cells have cell walls. b. Only animal cells have nuclei. d. Only animal cells have chromosomes.
A B C D	16.	Which of the following correctly sequences organisms from simplest to most complex? a. Eubacteria, plant, protist c. Fungi, animal, archaebacteria b. Eubacteria, protist, animal d. Plant, fungi, protist
A B C D	17.	Which of the following would NOT be used to classify an organism? a. Biochemical analysis c. The behavior of the organism b. The structure of the organism d. The population of similar species
A B C D	18.	The presence of gills and tails in the early stages of all vertebrates indicates common ancestry. Which of the following evidence from the fossil record supports this statement? a. Aquatic, gill-breathing vertebrates were the ancestors of air-breathing land species. b. Fossils are generally as old as the rocks in which they are found. c. Similarities among DNA indicate a common ancestor. d. Structural adaptations are not inherited from parents.
A B C D	19.	Over time, natural selection caused a change in the populations of light-colored and dark moths. Which of the following most likely occurred as the result of natural selection? a. All of the moths became light-colored. b. The dark moths increased in number until most of the moths of this species in the area were dark. c. The birds stopped eating the moths and found another food source. d. The moths were unable to reproduce and eventually became extinct.
A B C D	20.	Migration is an adaptation in which some species of birds fly long distances for the winter. Studies have shown that young birds do not follow older birds in the group during migration. What is migration? a. A territorial behavior c. An instinct b. A reflex d. An aggressional behavior
A B C D	21.	Which trophic level would organism Y feed at? a. First c. Third b. Second d. Fourth
A B C D	22.	Which of the following is NOT a characteristic shared by green algae and plants? a. Cell walls with cellulose c. Chlorophyll b. Root systems d. Stored food
A B C D	23.	The graph shows levels of atmospheric carbon dioxide over the past 250 years. Which statement best summarizes the trend shown in the graph? a. Levels of CO2 are rising. b. Levels of CO2 are decreasing. c. Levels of CO2 have remained the same. d. Levels of CO2 are fluctuating, but no pattern exists.
A B C D	24.	Which of the following processes would NOT contribute to the data shown on the graph? a. Respiration c. Decomposition b. Photosynthesis d. The burning of fossil fuels
A B C D	25.	What are the potential dangers if a chemical from a lab spills on your hand? a. Your hand could catch fire. b. You will risk being infected with bacteria. c. You could get a chemical burn. d. You could cut your hand.