Red
20. A scientist drew some diagrams of ancestors of elephants based on fossil evidence. (Refer to the pic in #20)
Which is the BEST conclusion that can be made from comparing the diagrams?
A. Elephant species have changed over time.
B. Ancient elephants were better adapted than modern elephants.
C. Elephant habitats have remained the same over time.
D. Elephant fossil evidence is widespread and complete
A. Elephant species have changed over time.
10.
The Florida panther has been listed as an endangered species since 1967. Which natural occurrence has MOST likely led to this species being unable to adapt and becoming endangered?
A. an increase in global warming
B. a decrease in genetic diversity
C. a decrease in hurricane activity
D. an increase in primary producers
B. a decrease in genetic diversity
What is the name of the scientist that came up with the theory of natural selection?
Charles Darwin
14.
The flowchart shown below describes the process of natural selection. (Refer to the pic in #14)
Which statement BEST completes the empty box in the flowchart?
A. Natural selection eventually stops as a population becomes more limited.
B. As environmental pressures constantly change, adaptations of organisms continue.
C. Overpopulation naturally follows as a consequence of natural selection.
D. As only a few organisms survive, populations will eventually die out.
B. As environmental pressures constantly change, adaptations of organisms continue.
3. A cricket population includes approximately the same number of black and light-brown crickets. Black crickets are easier for birds to locate and eat. Over time, the population begins to consist of only light-brown crickets. The change in the color of the cricket population is a result of...
A. limited resources.
B. natural selection.
C. geographic isolation.
D. climate change.
B. natural selection
17.
The following statements describe events in the life cycle of a rabbit. Which of these events describes a trait of the rabbit that is MOST likely passed on to future generations?
A. A young rabbit develops a bacterial infection and lives long enough to produce three litters.
B. A young rabbit constantly outruns predators and lives long enough to produce three litters.
C. A young rabbit survives freezing winter temperatures and digs a burrow in the spring.
D. A young rabbit migrates to find a better food supply and establishes a new territory.
D. A young rabbit constantly outruns predators and lives long enough to produce three litters.
Scientists dug through three layers of rock and found many rabbit fossils. The fossils were complete enough to determine the length of the rabbits’ hind feet. Consider the data in the table. (Refer to the pic in #19)
Which conclusion is BEST supported by the data?
A. Over time, rabbits that had shorter feet lived longer than rabbits that had longer feet.
B. Over time, rabbits that had longer feet lived longer than rabbits that had shorter feet.
C. Over time, rabbits that had shorter feet had more offspring than rabbits that had longer feet.
D. Over time, rabbits that had longer feet had more offspring than rabbits that had shorter feet.
D. Over time, rabbits that had longer feet had more offspring than rabbits that had shorter feet.
What is the third letter of the alphabet?
A) c
B) a
C) b
D) d
A) c
7. Which event is MOST likely to increase the genetic variation in a population of organisms?
A. improved hunting techniques
B. greater environmental stress
C. increased immigration
D. introduced predators
C. increased immigration
13. Scientists studied the taxonomic relationship between two lizard species living on the sides of a canyon. One species had long toes and one had short toes, but they were alike in most other ways. The table shows what the scientists found.
(Refer to the pic in #13)
What is the MOST likely reason for these findings?
A. Short-toed lizards evolved from long-toed lizards on the shady side of the canyon.
B. Short-toed lizards evolved from long-toed lizards on the sunny side of the canyon.
C. Long-toed lizards evolved from short-toed lizards on the shady side of the canyon.
D. Long-toed lizards evolved from short-toed lizards on the sunny side of the canyon.
A. Short-toed lizards evolved from long-toed lizards on the shady side of the canyon.
15. Scientists theorize that the ancient animal on the left is related to the modern animal on the right and has gone through many changes over time. (refer to the pic in #15)
How did the scientists conclude that the animal changed over time?
A. by examining fossil records
B. by learning about natural selection
C. by studying deposition of sediments
D. by observing different types of rock formations
A. by examining fossil records
1.
In the 1970s, the pesticide DDT was used to kill insects that damaged fruit and vegetable crops. Most insects died from being exposed to DDT, but some survived. These surviving insects contributed to an increase in their population by...
A. migrating to habitats that had different types of crops.
B. learning how to avoid being exposed to DDT.
C. passing the gene for DDT resistance to their offspring.
D. competing with other types of insects for food.
C. passing the gene for DDT resistance to their offspring.
The process by which animals change over time to meet the needs of their environment is called...
evolution!
2. Which event demonstrates that diversity among species requires long periods of time?
A. Caterpillars mature into adult butterflies.
B. A mule is produced from a cross between a horse and a donkey.
C. Each kitten in a litter can have a unique coat pattern.
D. Both horses and zebras have a common ancestor.
D. Both horses and zebras have a common ancestor.
Which is MOST likely responsible for the chinch bugs’ ability to survive repeated exposure to insecticides?
A. species diversity
B. genetic diversity
C. ecosystem diversity
D. population diversity
B. genetic diversity
Genetic crosses involving a particular type of flower exhibit complete dominance with respect to petal color. Red (R) is dominant to white (r). Using the Punnett square, what is the expected percentage of offspring that will have white flowers from a cross of parent flowers with a genotype of Rr.
A. 0%
B. 25%
C. 50%
D. 75%
B. 25%
Scientists discovered fossils of different organisms in some layers of rock. Organism 5 was discovered in the uppermost layer. The scientists wanted to determine if Organism 5 was related to other organisms found in older layers of rock. They compared physical traits and DNA similarities from all the fossils. Some of their results are shown in the table.
(Refer to the pic in #5)
Based on the table, which organism is MOST likely an ancestor of Organism 5?
A. Organism 1
B. Organism 2
C. Organism 3
D. Organism 4
D. Organism 4
6. Drought affects a population of plants. One specific plant’s growth rate slows in response to the drought. How could the drought-resistant trait become more common in the population?
A. Other plants will begin to produce drought-resistant seeds.
B. The drought-resistant plant will convey its traits to nearby plants.
C. Other plant species will cross-pollinate with the drought-resistant plant.
D. The drought-resistant plant will produce more seeds than the other plants.
D. The drought-resistant plant will produce more seeds than the other plants.
A male fruit fly is homozygous dominant for gray-body color (G) and is crossed with a
female fruit fly that is homozygous recessive for ebony-body color (g). What are the probable
phenotypes of the offspring?
A. 25% gray, 75% ebony
B. 50% gray, 50% ebony
C. 100% ebony
D. 100% gray
D. 100% gray
How can the fossil record be used as a way of providing evidence for natural selection?
Scientists can see how different species have changed or evolved over time by comparing them to their modern day descendants.
Genetic crosses involving a particular type of flower exhibit complete dominance with respect to petal color. Red (R) is dominant to white (r).
Using the Punnett square, what is the expected percentage of offspring that will have white flowers from a cross of parent flowers with a genotype of Rr.
(Refer to the pic in #11)
A. 0%
B. 25%
C. 50%
D. 75%
B. 25%
Students were investigating the effect of antibiotics on bacteria. The students exposed a colony of bacteria to an antibiotic and 10% of the bacteria survived. Over time, the surviving bacteria multiplied. When the second generation of bacteria was exposed to the same antibiotic, 85% survived. Which statement BEST explains the results of this investigation?
A. The original surviving bacteria passed a resistance to the antibiotic on to the next generation.
B. The original surviving bacteria multiplied faster when exposed to the antibiotic.
C. The second generation of bacteria changed their genes to be resistant to the antibiotic.
D. The second generation of bacteria inherited a weakness caused by the antibiotic.
A. The original surviving bacteria passed a resistance to the antibiotic on to the next generation.
9. A classification system is shown below. (Refer to the pic in #9)
Which characteristic places the king snake in a different class than the giant panda?
A. It is not a mammal.
B. It does not have a spine.
C. It eats other animals.
D. It sheds its skin.
A. It is not a mammal.
15.
Scientists theorize that the ancient animal on the left is related to the modern animal on the right and has gone through many changes over time. How did the scientists conclude that the animal changed over time?
A. by examining fossil records
B. by learning about natural selection
C. by studying deposition of sediments
D. by observing different types of rock formations
A. by examining fossil records
8. A student is investigating different types of trees. Two trees are found to have similar growth rates, temperature ranges, and sizes, but different leaves and flowers. The trees are MOST likely in...
A. the same species.
B. the same genus.
C. a different kingdom.
D. a different phylum.
B. the same genus.