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【单选题】
In the winter, the ptarmigan grows long white feathers on its___.
A.
head
B.
feet
C.
back
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参考答案：
参考解析：
刷刷题刷刷变学霸
举一反三
【单选题】Camouflage is the___ protection for the ptarmigan in the Pacific Northwest.
A.
last
B.
best
C.
only
【单选题】The moth lays eggs___ oak tree leaves.
A.
between two
B.
on the underside of
C.
on top of
【单选题】The caterpillars use camouflage to avoid being eaten by___.
A.
snakes
B.
rats
C.
birds
【单选题】The body of a praying mantis can look just like___.
A.
a predator
B.
a flower
C.
another insect
【单选题】Survival of the fittest is a synonym for (adaptation to the environment / natural selection / useful traits).
A.
adaptation to the environment
B.
natural selection
C.
useful traits
【单选题】When it hides on the ocean floor, only the___ of the flounder can be seen.
A.
fin
B.
tail
C.
eyes