What must be present in a flower in order for it to make seeds?
a. sepals
b. carpels
c. stamens and sepals
d. stamens and carpels
Ans: b. carpels
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Why is oil not degraded when in a natural habitat underground, yet susceptible to bioremediation in an oil spill?
A. The high pressure the oil is subjected to underground prevents bacteria from growing and consuming it. B. The bacteria can't be given the right amounts or types of nutrients to foster an increase in their number deep underground. Nearer the surface, human intervention can increase the factors that will raise the microbe quantity. C. The bacteria that degrade the oil require a higher than normal salt content, much like what is found in seawater. Underground, they lack this salt level. D. It IS degraded underground-but it happens at a much slower rate because a portion of the cycle is photosynthetic in nature. This process is dramatically increased nearer to the water's surface.
Within an organism, all cells have the same ____, whereas different cell types contain different ____
a. RNA; genes b. protein; RNA c. genes; proteins d. RNA; protein e. proteins; genes
The frequency of heterozygosity for the sickle cell anemia allele is unusually high, presumably because this reduces the frequency of malaria. Such a relationship is related to which of the following?
A) Mendel?s law of independent assortment B) Mendel?s law of segregation C) Darwin?s explanation of natural selection D) Darwin?s observations of competition E) The malarial parasite changing the allele
Bacterial predators such as Bdellovibrio are members of the betaproteobacteria
Indicate whether the statement is true or false