The Y chromosome:
A. carries no genes
B. is larger than the X chromosome
C. is smaller than the X chromosome
D. carries no genes and is smaller than the X chromosome
C. is smaller than the X chromosome
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Mosquitoes have been controlled in most parts of the world by the spraying of DDT. But after years of repeated sprayings, the number of mosquitoes has been increasing in spite of the continued use of DDT. Explain why this is the case.
What will be an ideal response?
Match each primate with its range:
1. lemur 2. baboon 3. spider monkey 4. langur Madagascar South America Africa Southeast Asia
The oldest Homo sapiens are found in Africa but only started appearing throughout the Old World __________ years ago
a. 50,000 b. 10,000 c. 5,000 d. 1,000
In India, traditional Nayar husbands and wives __________
a. always belonged to the same lineage b. had no social or economic responsibilities to each other c. had to belong to different castes d. were always cousins