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g100num [7]
2 years ago
9

What is the immune system designed to do

Biology
2 answers:
Artyom0805 [142]2 years ago
8 0
The immune system protects the body against disease or other potential damaging foreign bodies that may enter. It identifies and attacks a variety of threats including viruses, bacteria, and parasites while distinguishing them from the body’s own healthy tissue.
djyliett [7]2 years ago
6 0

Answer:

Explanation:

To fight against new invasion disease . Antigen play a big role

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Which identifies the relationship between photosynthesis and cellular respiration?
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Answer:

Both processes generate energy for cell use.

The products of one process are used as reactants by the other process.The products of one process are used as reactants by the other process.

Explanation:

Photosynthesis is the process by which glucose is formed in plants with the aid of light energy and chlorophyll. Cellular respiration is the breakdown of glucose to release energy, water and carbon dioxide. The end products of respiration are used in photosynthesis. Glucose formed from photosynthesis is used in respiration as a reactant.

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3 years ago
What is the main idea of this text?
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should be b

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Which type of change was seen in the ecosystems that were affected by the 1988 fires in Yellowstone Park
charle [14.2K]

Answer:SECONDARY SUCCESSION Explanation:Secondary succession can happen after primary succession or independently of primary succession.An example of Secondary Succession by stages:

1. An area of growth.

2. A disturbance, such as a fire, starts.

3. The fire destroys the vegetation.

4. The fire leaves behind empty, but not destroyed soil.

5. Grasses and other herbaceous plants grow back first.

6. Small bushes and trees begin to colonize the public area.

7. Fast-growing evergreen trees and bamboo trees develop to their fullest, while shade-tolerant trees develop in the understory.

8. The short-lived and shade-intolerant evergreen trees die as the larger deciduous trees overtop them. The ecosystem is now back to a similar state to where it began.

(Hope this helps)

3 0
3 years ago
The city of Los Angeles wants to know if there is a connection between physical fitness and air pollution. Fifty volunteers from
zheka24 [161]

Answer:

Control group: volunteer stationary bike riders in a pollution-free chamber

Experimental group: volunteer stationary bike riders in a chamber filled with air pollutants common to Los Angeles

Independent variable: exposure to air pollution

Dependent variable: The heart rates (physical fitness) of the volunteer riders.

Explanation:

In a scientific experiment, data is compared between the control group and experimental group to ascertain the effect of the independent variable on the dependent variable. A control group is the group in an experiment that is not treated with the independent variable i.e. the independent variable is controlled while the experimental group is the group that is treated with an independent variable.

N.B: The independent variable is the variable controlled by the experimenter in order to influence the dependent variable (measurable outcome).

In this experiment, the independent variable is the AIR POLLUTION the volunteer riders are exposed to while the dependent variable is the PHYSICAL FITNESS/ HEART RATES of the volunteer riders, which is dependent on the exposure to air pollution (independent variable).

The control group in this experiment is the volunteer riders placed in a POLLUTION-FREE CHAMBER where the independent variable cannot influence or have any effect on the measurable variable (dependent). The experimental group is the volunteer riders placed in a CHAMBER FILLED WITH AIR POLLUTANTS. The independent variable (air pollution) has been changed in the experimental group.

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3 years ago
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