Cheetahs are cats native to the African continent. The population numbers have been drastically reduced in the past. Also, the allele frequencies of the cheetah populations are very similar, with little or no differences among populations. Individuals are virtually genetically identical. The loss of genetic variation in cheetahs is likely due to
1.a founder effect
2.a bottleneck effect
3.sexual selection
4.chance
2
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A white cow was mated with a red cow, and they had an offspring who was roan – the calf had an even mixture of white hairs and red hairs covering her body. What is the most likely explanation of the inheritance of the roan coat?
A. red is dominant and white is recessive B. red and white are codominant C. incomplete dominance D. X-linked dominance E. pleiotropy
The biosphere is defined as the portion of _____ where life exists.
A. the earth B. the atmosphere C. the ocean D. land on Earth E. fresh and salt water
Select the components of memory.
A. ability to hold a thought in mind B. ability to recall events from the past C. ability to use past memories in order to form new associations.
Why is e-waste (electronic waste) considered to be hazardous?
A. E-waste is a common source of air pollution. B. Many sources of e-waste leach heavy metals like lead (Pb) into the environment. C. E-waste makes up about half of the waste in the Great Pacific Garbage Patch. D. E-waste is most commonly found at Superfund sites. E. Lead (Pb) measured in leachate from e-waste was found to be below regulatory levels.