Estion 4 (May/June 2016 P1) Research shows that the average age of first menstruation is influenced by
socio-economic status as well as race.
Scientists carried out an investigation to determine the average age of the first
menstruation of the girls in a community
Their hypothesis was
The average age of first menstruation has decreased over time.
2.5.1 For the investigation state the
(a) Independent variable
(b) Dependent variable
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What was the land like over 500 million years ago? what was under the sea?

How is the national wildlife refuge system similar to the pacific region coastal program? a. both programs are concerned with providing habitats for wildlife b. both programs are primarily concerned with preserving fish species c. both programs have set aside 150 million acres of land d. both programs are under the u. s. fish and wildlife service

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?