Aland developer and several ecologists are discussing how a parcel of private land should be developed while saving 20 hectares as natural habitat. the land developer suggests that the 20 hectares be divided into twenty separate 1-hectare areas. the ecologists suggest that it would be better to have one intact parcel of 20 hectares. what is the significance of these different arrangements of the 20 hectares?

a. the isolated hectare piots increase the ability of individuals to disperse from one habitat to another.
b. the large plot will create more inbreeding in many species
c. there really is no difference: they should both work equally well.
d. the isolated plots are more vulnerable to edge effects.

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?

What organ systems are working to you cool down after a workout?

Refer to the family pedigree shown here. in generation i, one parent is affected by the gene mutation and one parent isn't. in generation ii, all three children are affected by the gene mutation. what can you conclude about this gene mutation? a. all children born in future generations will be affected by this disorder. b. this gene mutation is a dominant disorder. c. this gene mutation is a recessive disorder. d. the generation i mother is a carrier of this gene mutation.