Silkworms are grown commercially for the silk that they spin when they make their cocoons. the silkworm eats white mulberry leaves. can the relationship between the silkworm and the mulberry plant be considered commensalism? a. no; the plant is harmed by the silkworm. b. no; no one benefits from this relationship. c. yes; the silkworm benefits and the plant is not affected. d. yes; both organisms benefit from this relationship.

Archeologists have discovered three sites showing conclusive evidence for the mastery of fire in tanzania, from a period slightly after the time that homo habilis was present in africa. these sites clearly were founded by homo erectus, the descendent species of homo habilis that migrated north, out of africa and into asia. homo erectus was known to have mastered fire, from ample evidence at sites in asia. there is no reason to attribute mastery of fire to homo ergaster, the descendent species of homo habilis that remained in africa.which of the following is an assumption on which the argument depends? (a) before their migration, homo erectus occupied african territory as far south as tanzania.(b) the strain of migration provided the selective pressure motivating homo erectus‘ mastery of fire.(c) homo ergaster would not have derived as much benefit from the mastery of fire as did homo erectus.(d) homo ergaster inherited all cultural knowledge from homo habilis, a species that did not have mastery of fire.(e) homo ergaster did not occupy regions as far south as tanzania until well after the time of these three sites.

The importance of the mind as a part of the body is an example of:

When fossil fuels are burned, carbon dioxide is released. how does this gas impact the environment?