Biology, 17.12.2019 17:31 tonyiacamper1
British investigators conducted a study to examine measles- mumps-rubella (mmr) vaccine history among 1,294 children with pervasive development disorder (e. g., autism and asperger's syndrome) and 4,469 children without such disorders. (they found no association.) this is an example of which type(s) of study?
a. randomize control trial
b. case-control
c. cross-sectional
d. retrospective cohort
Answers: 3
Biology, 22.06.2019 00:40
Some birds look for food near cattle and other livestock. the movement of the cattle churns up the ground, making insects available to the birds. the cattle appear to be unaffected by the presence of the birds. what kind of relationship exists between the birds and the cattle? o a. parasitism o b. commensalism o c. predation o d. mutualism
Answers: 2
Biology, 22.06.2019 02:30
Which of these is most likely to happen if parallax measurements of star distances are taken after a gap of six months? the results would be accurate the results would be inconsistent the results would not be valid the results would not be repeated
Answers: 1
Biology, 22.06.2019 10:30
Explain what a zygote is. use the terms egg cell, sperm cell, and fertilization in your explanation.
Answers: 1
British investigators conducted a study to examine measles- mumps-rubella (mmr) vaccine history amon...
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