Hannah is 5 years old. she has been diagnosed with adhd and shows signs of learning disabilities. her doctor suggests that hannah's problems could be the result of prenatal exposure to though he stresses that the link is not straightforward at this time

If two parents who's blood types are both b produce a child that has blood type o, what can you say about the parent's genotybes? oa) one is ii ob) one is ibi oc) both are bi od) nothing, this is impossible

Humans are believed to have evolved in coastal regions in east africa. the region had an abundant supply of fish for early humanoids to eat. when scientists analyze the fads gene they see an interesting pattern. people whose families have lived in this area of east africa for generation show a high level of diversity in alleles for the fads gene. conversely, people whose families had migrated inland a moderate distance from sources of fish showed a much lower diversity for fads gene alleles. additionally, the fads alleles found in people whose family has lived inland for generation are almost all gene alleles which produce fads proteins with a high level of function and activity. how do anthropologists explain this?

Some plants release toxic chemicals that kill or harm nearby plants. what type of example is this? 1 cooperation 2.mutualism 3.competition or 4.parasitism