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, 22.06.2019 05:00
A60-tooth gear is connected to a 72-tooth gear.if the smaller gear turns 12 times,how many turns does the larger gear make?
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Biology, 22.06.2019 11:00
Fill in the blank 1. digestion occurs in the small intestine through the action of enzymes. 2. urea, excess water, and other waste materials are eliminated in a water fluid called 3. can cause infections by injecting dna or rna into hosts. 4. the human immune system produces in response to a vaccine, which later can bind to and destroy a pathogen if it invades. 5. are structures that link bone to bone at a joint 6. in the heart, blood flows from the right atrium to the right ventricle, where it is pumped to the the words i can use are: lymphocytes gliding pivot gas urine absorption dermis fulcrum lungs chemical viruses capillary vertebrae esophagus tendons antibodies synapses ligaments kidneys pathogens
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Biology, 22.06.2019 13:00
What is the function of the root cap? a. extra-absorbent cells in the root cap absorb more water and nutrients b. protect the meristematic area of the stem c. contains sensors for sunlight d. increases surface area of the root
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