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Gr8 Science Unit 5 Mid-Unit Assessment

Last updated about 1 year ago
12 questions
Note from the author:
1. Ensure all tabs on your Chromebook are closed before beginning your assessment.
2. You will be given 15 minutes to complete your Unit 5 Mid-Unit Assessment.
3. Please read all questions carefully and make sure to check your work before submitting.
1. Ensure all tabs on your Chromebook are closed before beginning your assessment.
2. You will be given 15 minutes to complete your Unit 5 Mid-Unit Assessment.
3. Please read all questions carefully and make sure to check your work before submitting.
Base your answers to questions 1 through 2 on the passage below and on your knowledge of biology.
Required
1

Describe one way the immune system could respond when it is exposed to the genetically altered Bacillus subtilis.

Required
1

State one advantage of using edible modified spores as vaccines.

Required
1

Base your answers to question 3 on the information below and on your knowledge of biology.

Explain how vaccinations protect against diseases:

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1

Single-celled organisms are able to maintain homeostasis, even though they lack higher levels of organization such as organs and organ systems, because:

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1

To prepare for an experiment, ten different sources of food were sterilized and kept in a sterile container. Bacteria of the same species were placed on each of the ten different food sources and kept at 26°C for two days. During this time, bacteria grew in nine of the containers.

Based on this observation, the scientist could conclude that:

Required
1

SCIDS (Severe Combined Immunodeficiency Syndrome) is a disorder where a genetic mutation inhibits the production and functioning of T-cells. T-cells are special types of white blood cells that play a role in the body’s immune response.

A possible symptom of SCIDS would be an increase in the:

2

Complete Question 7 on a separate sheet of paper*

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1

Base your answers to question 8 on the information below and on your knowledge of biology.


Describe one way that the stimulated immune system could react to the cancer cells in Step E.

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1

Which substances may form in the human body due to invaders entering the blood?

Base your answers to questions 10 and 11 on the information below and on your knowledge of biology.

Since 1980, the vulture population in India has declined from 40 million to 60 thousand due to poisoning by a pain reliever used in cattle. If only 1% of the cattle carcasses fed on by vultures are animals that have been treated with the drug, it can lead to a drastic decline in the vulture population. The grim picture is that over 10% of the carcasses have been found to contain this drug.

Vultures feed exclusively on the carcasses of dead animals. This helps to prevent the spread of diseases such as rabies and anthrax among wildlife, livestock, and humans. Without as many vultures present, other scavengers such as dogs have moved in and taken advantage of the newly available food. The abundance of these other scavengers has led to an increase in the number of cases of human rabies and an outbreak of tuberculosis, anthrax, and foot-and-mouth disease. These diseases are not spread to humans by vultures.
Required
1

The best explanation for the increase in rabies, anthrax, and other diseases in humans is that the:

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1

Dogs can be vaccinated against the rabies virus. When a vaccinated dog is exposed to the rabies virus, the dog will most likely:

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1

A class carried out an experiment to test the effect of rest time after exercise on the breathing rate. Each member of the class ran up and down stairs for 60 seconds. After exercising, they rested. The students then measured their rate of respiration by counting the number of inhales and exhales per minute for 7 minutes. The class then averaged their data.

Provide a biological explanation for why the breathing rate decreases several minutes after physical activity has stopped: