Yellow spotted coloration in certain plants shows up randomly distributed in offspring, no matter what parental crosses are made. there is also a random distribution of the trait between male and female plants. assuming that one gene is responsible for the trait, which statement could be true about this gene? '
a. it could be a sex-limited trait b. it could be a dominant trait c. it could be carried by a chloroplast chromosome. d. it could be carried by a sex chromosome.

Sediment layers stop lateral spreading when: they encounter a barrier they encounter an opposing current they run out of additional sedimentary material

Hemoglobin is a proton that carries oxygen around your body what is hemoglobin made from

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.