Question

the frog pictured above is larger than 1.5 inches and smaller than 6 inches. use this information, along with the dichotomous key shown and your own observations from the picture, to determine the frogs species name.
a. lithoria caerulea
b. acris crepitans
c. bufo marinus
d. bufo boreas

Explanation:

根据题目所给信息，青蛙尺寸大于1.5英寸且小于6英寸，按照分类检索表，先看#1，满足“Larger than 1.5 inches.Smaller than 6 inches”，接着看#2，因为小于6英寸，所以“go to #3”。再看#3，从图片观察青蛙皮肤有疣（warts），所以“go to #4”。看#4，图片中青蛙头部没有三角形标记（No triangular mark on head），所以“go to #5”。看#5，图片中青蛙背部有从头部到尾部的条纹（Stripe on back from head to tail），对应物种是Western Toad（Bufo boreas）。

Answer:

D. Bufo boreas