Within a genus that normally produces large numbers of offspring, one particular species evolves maternal care behavior. What do you predict will happen to the survivorship curve?
A. No change is likely.
B. It may change from type I to type II.
C. It may change from type III to type I.
D. It may change from type I to type III.
Answer: C
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In Lake Victoria, hundreds of cichlid fish species arose after the lake last dried up 12,400 years ago. This is an
example of ____.
a. sympatric speciation b. the founder effect c. gene flow d. genetic drift e. allopatric speciation
Closely related plant species that attract different pollinators resulting in reproductive isolation is an example of
A. sympatric speciation. B. allopatric speciation. C. hybrid inviability. D. hybrid infertility. E. hybrid breakdown.
Gross anatomy
What will be an ideal response?
Which of the following are the only extant animals that descended directly from dinosaurs?
A) lizards B) crocodiles C) birds D) tuataras