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

And give a detailed description! scientist observes the boundary between two tectonic plates for a decade and finds that no new volcanoes have formed over the course of her investigation. does this result support the theory of plate tectonics? why or why not?

Which of the following is a common response to cell signaling?

1. seamount a raised footwall block between normal fault creates this 2. syncline break between rocks where a hanging wall rises relative to a footwall 3. hot spring on rolling hills, this a dip between hills 4. volcanic neck created when a block with hanging walls slips down between normal faults 5. caldera underwater volcano that never reaches above sea level 6. horst natural hot water on earth's surface containing many minerals 7. graben underwater volcano whose top is eroded flat by waves 8. crater less than a mile in diameter; looks like a bowl at the top of a volcano 9. guyot magma that filled the central vent that remains after the volcano has eroded 10. reverse fault over 1 mile in diameter; looks like a bowl over a volcano