c. system
b. law
d. sequence
b. Carbon monoxide and sulfur oxides are common air pollutants.
c. Natural components of air, like carbon dioxide, cannot be considered air pollutants.
d. Primary and secondary pollutants are harmful to human health and the environment.
Answer: c) Natural components of air, like carbon dioxide, cannot be considered air pollutants.
Explanation:
Carbon dioxide plays a role as greenhouse gas. Though living being emit carbon dioxide when they breathe, carbon dioxide is considered as a pollutant when associated with cars, power plants, and other human activities that involve the burning of fossil fuels such as gasoline and natural gas.
Answer: False
Explanation:
Humoral immunity depends on B Cells whereas cell immunity depends on T Cells.
T cells are not programmed to provide humoral immunity, which is primarily mediated by B cells. T cells are involved in cell-mediated immunity where they directly attack and destroy infected cells.
T cells are not programmed to provide humoral immunity. Humoral immunity, also known as antibody-mediated immunity, is primarily mediated by B cells which produce antibodies specific to each pathogen. T cells, on the other hand, are involved in cell-mediated immunity where they directly attack and destroy infected cells. Memory cells are a type of B and T cells that form after exposure to a pathogen and mount rapid responses upon subsequent exposures.
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deflection of the winds to the left in the Northern Hemisphere
B.
uneven heating of both hemispheres by the sun
C.
deflection of the winds to the right in the Southern Hemisphere
D.
deflection of the winds to the right in the Northern Hemisphere
Answer:
A mixture is a combination of two or more substances which are bound chemically. Identities of each substance is retained in the mixture.
Solid-solid mixture is sub-type of mixture which are formed by mixing two or more solids.
For example, soil (mixture of sand, silt, clay etc), gun powder (mixture of carbon, potassium nitrate, sulphur), etc.
Similarly, in class various solid mixtures are found such as: