Biology, 06.01.2020 22:31 darenl3601
Every time a child visited a cousin who has two cats, the child's eyes turned red, itched, and began to water. then, the child began to have trouble breathing. it is most likely that the child reacted this way because
(1) normally harmless cat antigens stimulated the immune system
(2) it is difficult for the respiratory system to filter cat antigens out of the inhaled air
(3) cat antigens are a health hazard, since they always cause disease
(4) cat antigens stop the immune system from making antibodies, so bacteria cause these responses
Answers: 1
Biology, 21.06.2019 23:20
Ascientist wants to determine the effect of a new type of gasoline. he fillsone car with normal gasoline and another identical car with the new gasoline.which is the control group? a. the new type of gasolineb. the car with the normal gasolinec. the car with the new gasolinethe amount of gasoline usedd. the amount of gasoline used
Answers: 1
Biology, 22.06.2019 22:30
Color blindness is a recessive trait. the gene for color blindness is on the x chromosome. the family tree below shows the traits of color blindness. the only unknown is the father in the generation.
Answers: 3
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