The diploid portion of a plant life cycle is known as the:a
parental generation.
b. sporophyte generation.
c. daughter generation.
d. gametophyte generation.
e. reproductive generation.
b
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Which of the following statements about DNA replication is INCORRECT?
A. It begins at multiple origins of replication sites along eukaryotic chromosomes. B. It proceeds with the addition of new nucleotides to the 3? end of a growing DNA strand. C. It is powered by the hydrolysis of ATP. D. Each strand within the DNA double helix is used as a template for synthesis of a new strand. E. It requires that each strand in the double helix be separated from the other.
Purification of waters while generating power and providing energy for monitoring environmental processes is an application of microbial fuel cells.
Answer the following statement true (T) or false (F)
In female gamete development in humans and other vertebrates, the net result of meiosis is the production of one large egg and three small cells with very little cytoplasm. These three small cells:
a. degrade almost immediately. b. fertilize the egg. c. divide to form secondary egg cells. d. fuse together to form the placenta. e. act to nurse the egg cell.
When the London underground (subway) system was built in the nineteenth century, mosquitoes moved into the tunnels and became adapted to biting the customers and small animals that inhabit the subway system. Like people, mosquitoes can freely enter and
leave through the tunnel entrances. Recently, DNA analysis and attempts to cross-breed above-ground mosquitoes with underground mosquitoes indicate that there are now two different species. The underground insects are visibly larger. Which term best describes what has happened? A) behavioral incompatibility B) population bottleneck C) temporal isolation D) sympatric speciation