D
I answered C and it was marked wrong
1. True- because scientific theory means that <span>idea supported through research that attempts to explain existing observations or predict new ones.</span>2. False- because a cross-sectional means that its a study that is about different groups.
3. B-<span>An extraneous variable clarifies the relationship between the independent and dependent variables.</span>
The type of immunity that uses both helper and killer cells is Cellular Immunity. It is used by Cellular immunity to classify the abnormal cells. Once abnormal cells are detected it is destroyed by Cellular Immunity. Cellular Immunity serve as resistance from diseases caused by viruses.
<h3>
Answer:</h3>
Asthma
Asthma is a chronic illness that results in difficulty breathing, especially when doing strenuous activity. This is because people with asthma have narrow airways that can be restricted by mucus.
<h3>Other Answer Choices</h3>
Anemia
Anemia is defined as a lack of red blood cells, most commonly linked to an iron deficiency. Without the proper red blood cells, the body cannot transport oxygen like it is supposed to.
This results in:
- Headaches
- Dizziness
- Lightheadedness
- Fatigue
- Increased heart rate
Arthritis
Arthritis is the inflammation of the joints. Arthritis has a wide range of causes like infection, tearing, or other diseases. Arthritis is usually found in the elderly.
Symptoms include:
- Pain in the joints
- Stiffness in the joints
- Swelling
- Decreased range of motion
- Fatigue
Arteriosclerosis
Arteriosclerosis is the build-up of cholesterol in the arteries that blocks the flow of blood. Like arthritis, arteriosclerosis is linked to old age but can be avoided through exercise and a healthy diet.
It is possible to have no symptoms of arteriosclerosis, but it can be tied to:
- Pain in the leg
- Heart attacks
- Strokes
- Death
Answer:
1) Linebacker
: Defends against the pass and push forward to stop the run or tackle the quarterback
2) cornerbacks and safties
: Battles with the offensive line to try to stop a play or sack the quarterback
3) wide receivers
: Catch the balls thrown by the quarterback
4) running backs
: Take a handoff from the quarterback and run with the ball
5) guards and tackles
: Defend against the pass from the quarterback to the wide receiver and also help stop the run
6) tight ends
: Snaps the ball to the quarterback and blocks the defense
7) Center
: Keeps the defense from trying to get the quarterback or running back
8) defensive line
: Block the defense and will also catch passes
9) quarterback
: Pass or hands off the ball
