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Graded Assignment
Graded AssignmentUnit Assessment, Part 2: Survey of Living Things 2
Complete this teacher-scored portion of the assessment and submit it to your teacher.
Total score: ____ of 15 points
(Score for Question 1: ___ of 5 points)
1. What happens to the immune system of a person with HIV, and how may that infection develop into AIDS?
Answer:
Type your answer here.
(Score for Question 2: ___ of 5 points)
2. What are some ways in which plants defend themselves from herbivores? Describe two physical defenses and two chemical defenses.
Answer:
Type your answer here.
(Score for Question 3: ___ of 5 points)
3. Describe how the nervous system helps different parts of your body communicate with one another the moment you begin to pet a dog.
Answer:
Type your answer here.
The immune system of an individual with HIV is compromised as the virus destroys CD4 T-cells, potentially leading to AIDS. Plants use physical defenses like thorns and tough leaves, and chemical defenses such as toxic compounds and attractive organic compounds to deter herbivores. The nervous system communicates touch when petting a dog, interpreting signals and coordinating muscle response.What happens to the immune system of a person with HIV, and how may that infection develop into AIDS?When a person is infected with HIV, the virus targets and destroys cells in the immune system, specifically the CD4 T-cells. Over time, HIV can reduce the number of CD4 cells, weakening the immune system, which makes it harder for the body to fight off infections and diseases. If the number of CD4 cells falls below a critical level or the person acquires certain opportunistic infections, the HIV infection progresses to AIDS (Acquired Immunodeficiency Syndrome), the last stage of HIV infection, characterized by a severely compromised immune system.What are some ways in which plants defend themselves from herbivores?Plants have evolved a variety of defenses against herbivores. Two physical defenses include thorns, which deter animals from eating them, and tough leaves, which are difficult to chew and digest. Two chemical defenses are the production of toxic compounds, which can poison or deter herbivores, and volatile organic compounds that attract predators of the herbivores, offering indirect protection.Describe how the nervous system helps different parts of your body communicate with one another the moment you begin to pet a dog.The nervous system facilitates communication between different parts of the body when you pet a dog. Sensory neurons in your hand transmit the sensation of touch to the spinal cord and brain. The brain then interprets these signals and sends instructions via motor neurons to your muscles to continue the petting motion and respond to the dog's behavior, ensuring a coordinated action....