Achild who is being evaluated for an immune deficiency fails to make antibody to tetanus toxoid or pneumococcal vaccine, but shows normal cell-mediated immunity as indicated by a positive skin test (swelling and redness) to a commonly encountered environmental antigen. this child has an abnormality of which cell lineage? think in: cellular immunity vs humoral immunity
Answers: 2
Biology, 22.06.2019 10:00, alexwlodko
Based on the observation that only male crickets produce a song, you hypothesize that a male's song is a form of communication to potential mates. you set up a simple experiment to test this hypothesis. in the laboratory, you place a male snowy tree cricket in enclosure a, which is adjacent to enclosureb. in enclosure b, you place other insects, one at a time, and observe their responses to the male's song. the enclosures are designed so that the two insects being tested cannot see or smell each other, but sound is transmitted from enclosure a to enclosureb.
Answers: 1
Biology, 22.06.2019 10:30, amorrison10181
The eruption of a nearby volcano causes a prairie ecosystem to receive a lot less sunlight. which of these is most likely effect on the ecosystem?
Answers: 2
Biology, 22.06.2019 15:30, camiee13dvivvj
Which environmental change would most likely result in bullfrog offspring that are able to store more water than bullfrogs in previous generations?
Answers: 1
Achild who is being evaluated for an immune deficiency fails to make antibody to tetanus toxoid or p...
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