Practice Exam Answers

How does conservation affect biodiversity?

Which best describes the relationship between two species and a niche?

If the producer population in an ecosystem decreased, what would most likely happen to the size of the herbivore population?

A muskrat population is growing exponentially. What might cause this population to enter logistic growth?

A population of wolves in Wyoming experienced a rapid decline. Scientists found that 20 wolves died from rabies, 15 wolves died from mange (a parasitic mite), and 10 wolves died from natural causes. Wyoming experienced a recent drought, and many populations, including deer, bison, and bear, have diminished in the past year. What is best described in this scenario?

Variations within a species are an important part of Charles Darwin's theory of evolution. Which example can be explained by individual variation?

How is a brain injury classified?

A family released their pet fish family into a local pond. The fish had no known local population. The impact of the fish on the ecosystem is not yet known. Which term would best define the fish added to the pond?

The Great Pacific Garbage Patch is an area in the North Pacific Ocean that contains trash and causes harm to ocean life and those that consume that life. What lessons can be learned from this floating pile of trash?

Svetlana and her mother are very similar. Both have blonde hair, a love of scrapbooking, blue eyes, and a thin nose. Which statement most likely describes Svetlana’s traits?

Justine was feeling very sick. She went to the doctor, who told her she had a bacterial infection and withdrew blood for blood work. Which component in Justine’s blood would be higher than normal?

Which action is a physical change in digestion?

In rock layers, jellyfish fossils are found lower than trilobite fossils, and trilobite fossils are found lower than ammonite fossils. What can be determined from this information?

Which organ systems work together to help the body shiver in order to maintain homeostasis?

Changes in the gene pool can occur due to various mechanisms. In 1989, a large oil spill occurred in Prince William Sound, Alaska, when the Exxon Valdez oil tanker ran aground. Approximately 11 million gallons of oil were spilled and spread 1,300 miles along the Alaskan coastline. The damage from the oil spill affected thousands of animals in the area, including killer whales, harbor seals, sea otters, fish, and sea birds. Which mechanism most likely affected the gene pools of the organism populations in the areas around the oil spill?

Cystic fibrosis is a genetic disorder. It is a recessive trait that is determined by two alleles. Suppose two parents each carry at least one recessive allele, but neither of them has cystic fibrosis. Which statement reflects the likelihood of a child of these parents having cystic fibrosis?

A plant that has round and yellow seeds (RrYy) is crossed with a plant that has round and yellow seeds (RrYy). What is the ratio of the offspring that will have round and yellow seeds? Key: R is equal to round r is equal to wrinkled Y is equal to yellow y is equal to green

Round seeds and yellow seed color are dominant to wrinkled seeds and green seed color. Which Punnett square represents the correct way to set up the cross RRYy times RrYY ?

Which blood type could be given as a transfusion for patient with AB blood when the RH factor is unknown?

Which family members have red-green color blindness?

According to the cladogram, which characteristic was used to separate bony fish from amphibians?