Ques: Q: What important and unusual physical property (for birds) do ostriches and penguins share? Choices: - waterproofness - webbed feet - bonelessness - flightlessness A:
Ans: flightlessness

Ques: Q: Binary fission is an example of which type of production? Choices: - primitive - algal - sexual - asexual A:
Ans: asexual

Ques: Q: In birds, lightweight air-filled bones and a large four-chambered heart are examples of adaptations for what purpose? Choices: - speed - long lifespan - mating - flight A:
Ans: flight

Ques: Q: What disease is caused when the oomycete plasmopara viticola parasitizes grape plants? Choices: - dainty mildew - alkaline mildew - toxic mildew - downy mildew A:
Ans:
downy mildew