prettyswagg63oz3tyz
25.03.2020 •
Biology
Question 25 of 25
2 Points
A biologist began studying a population of bullfrogs. In 1998,
she found that most of the male frogs croaked, but some did
not. A bat species known to prey on male frogs migrated to
the area in 2005. The biologist returned to the area in 2008
and repeated population counts of male frogs. The table
shows her data.
1998
2002
2004
2008
Number of
noncroaking males
244
368
298
1086
Number of croaking
males
742
1165
791
305
What factor most likely caused the noncroaking male
population to increase after 2004?
O
A. Learning to avoid the new predator
O
B. Adaptation of the croakers in the presence of a new predator
O
C. Extinction of the croakers because of the new predator
O
D. Selective pressure in the form of a new predator
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Ответ:
pretty sure it is an ultrasound