IB Biology Midterm Study guide Exam Questions With 100% Correct Answers

IB Biology Midterm Study guide Exam Questions With 100% Correct Answers 1. Which are examples of homologous structures? A. The wings of bats and butterflies B. The fins of fish and whales C. The hindlimbs of frogs and grasshoppers D. The forelimbs of primates and penguins - answerD. The forelimbs of primates and penguins 2. Which is an example of natural selection? A. A giraffe stretching its neck to reach higher leaves B. A juvenile bird learning to sing C. Development of antibiotic resistance in bacteria D. Selective breeding of tail-less cats - answerC. Development of antibiotic resistance in bacteria * 3. The diagram shows the major events involved in the formation of a blood clot. What is Factor Y? (bottom left) A. Fibrin B. Prothrombin C. Fibrinogen D. Thrombin - answerC. Fibrinogen 4. Which statement applies to HIV? A. HIV infects red blood cells resulting in decreased production of hemoglobin. B. HIV can be effectively treated using antibiotics. C. HIV can only be transmitted by sexual intercourse. D. HIV causes a reduction in production of antibodies. - answerD. HIV causes a reduction in production of antibodies. 5. What is required for natural selection to occur? I. Acquired characteristics II. Advantageous characteristics III. Genetic variation A. I only B. I and III only C. II and III only D. I, II and III - answerC. II and III only 6. What is the reason for antibiotics not damaging human cells? A. The dose is too small to be harmful. B. The dose is taken for only a short time. C. Antibiotics occur naturally in humans. D. Human metabolism is different from bacterial metabolism. - answerD. Human metabolism is different from bacterial metabolism. 7. What is the role of the joint capsule in an elbow joint? A. It seals the joint to retain the synovial fluid. B. It provides a point of attachment for muscles. C. It produces cartilage to reduce friction during movement. D. It directs the formation of bone tissue during growth and development. - answerA. It seals the joint to retain the synovial fluid. 8. What are features of both endoskeletons of mammals and exoskeletons of insects? A. They are both made of bone. B. They both have cartilage. C. They are both moved by antagonistic sets of muscles. D. Both consist of dead tissue. - answerC. They are both moved by antagonistic sets of muscles. 9. What is the order of increasing size of muscle structures? A. muscle, muscle fibre, myofibril, sarcomere B. myofibril, muscle fibre, sarcomere, muscle C. sarcomere, myofibril, muscle fibre, muscle D. muscle fibre, sarcomere, myofibril, muscle - answerC. sarcomere, myofibril, muscle fibre, muscle Ebola virus disease (EVD) is the disease in humans and other primates that is caused by the Ebola virus. Fruit bats are the reservoir for the virus and are able to spread the disease without being affected. Humans can become infected by contact with fruit bats or with people infected by the virus, their body fluids or equipment used to treat them. The table shows data for four African countries that were affected by the Ebola outbreak. 10a. Identify the country with the largest number of Ebola cases. - answerSierra Leone . 10b. Identify the country with the largest number of deaths. - answerLiberia One piece of evidence from the data that would support this analysis is: The country with the biggest population is Mali with the lowest number of deaths and the country with the lowest population is Liberia with the biggest number of deaths . - answerOne piece of evidence from the data that would support this analysis is: The country with the biggest popula