While on an intersession course in tropical ecology, kris pulls a large, snakelike organism from a burrow (the class was granted a collecting permit). the 1-meter-long organism has smooth skin, which appears to be segmented. it has two tiny eyes that are hard to see because they seem to be covered by skin. kris brings it back to the lab at the field station, where it is a source of puzzlement to the class. kris says that it is a giant oligochaete worm; shaun suggests it is a legless amphibian; kelly proposes it belongs to a snake species that is purely fossorial (lives in a burrow).which characteristic should permit the class to conclude that it is probably not a snake?
a) the number of eyes
b) its presence in a burrow
c) the absence of scales on its surface
d) the size and condition of its eyes
e) its length

In a hypothetical breed of dogs, coat color is controlled by two genes. there are six different coat colors in this breed: black, brown, cream, gray, silver, and tan. consider the following crosses. cross 1: black females from a lineage of all black dogs are crossed with brown males from a lineage of all brown dogs. f1 males and females are all black. when f1 are intercrossed, f2 males and females are black or brown. cross 2: black females from a lineage of all black dogs are crossed with tan males from a lineage where all males are tan and all females are cream. f1 males are black, f1 females are gray. when f1 are intercrossed, f2 males and females are black, brown, gray, or tan. cross 3: silver females from a lineage where all females are silver and all males are gray are crossed with brown males from a lineage of all brown dogs. f1 males and females are all gray. when f1 are intercrossed, f2 males are black, brown, gray, or tan, f2 females are cream, gray, silver, or tan. select the correct statements regarding the mode of inheritance of the coat color genes. a) both genes are x-linked. b) both genes are autosomal. c) one of the genes modifies the expression of the other gene. d) each gene has an additive effect on the intensity of coat color. e) each gene independently specifies three colors. f) one of the genes is autosomal, and the other is x-linked.