In India, the cattle disease rinderpest caused only mild illness, but in Africa the same disease killed over 80% of the cattle across the continent. What is the best explanation for the difference?
A. Faster spread of the disease in Africa due to wildebeests and buffalo
B. Genetic resistance in the Indian cattle due to prior exposure
C. Different temperatures in Africa and India
D. Better veterinary care in India
Answer: B
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While fishing, a biology student makes the following observations:
1) Water spiders appear to be able walk on the surface of the water. 2) Flat rocks may be made to skip across the water. Which of the following properties of water can explain these observations? A) Water is an excellent solvent. B) Water molecules create spheres of hydration around solute molecules. C) Water molecules are cohesive. D) Water molecules are often associated via hydrogen bonds. E) both choices C and D
You are studying an ecosystem in your campus; after a solid base of carefully observed and described
facts, your next step would be to:
a. make more observations. b. share your data with others. c. design an experiment. d. wait for instructions. e. make a hypothesis.
According to data from the Human Genome Project, the number of genes in the human genome is estimated to be
between _____. a. 20,000 and 25,000 b. 50,000 and 75,000 c. 150,000 and 200,000 d. 5,000 and 10,000 e. 80,000 and 100,000
A maximum of ___ alleles are possible for each SNP.
What will be an ideal response?