Indicate the differences between protostomes and deuterostomes, and list the phyla of animals in each group.
What will be an ideal response?
Protostomes are animals whose blastophore in the gastrula stage of development becomes a mouth; the anus develops later. In deuterosomes, the blastophore becomes the anus. Other differences in development and the formation of the coelom exist. Protostomes: Platythelminthes, Rotifera, Annelida, Mollusca, Nematoda, and Arthropods. Deuterosomes: Echinodermata, Chordata.
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A small amount of DNA is collected from a crime scene. However, the amount of DNA collected is insufficient to perform the necessary experiments to link a suspect to the crime. Which method could be utilized to increase the amount of DNA?
A. polymerase chain reaction (PCR). B. DNA sequencing. C. fluorescent labeling of DNA. D. microarray analysis. E. gel electrophoresis.
In contrast to bioremediation, which as a strategy for ______________, biological augmentation ______________ a degraded ecosystem.
a. replacing extirpated species.... removes man-created pollutants and toxins from b. eradicating a crippling disease in a keystone species... involves planting fruit and grain bearing crops to provide more forage in c. removing harmful substances... uses organisms to add essential material to d. adding new species to control problem species... adds fertilizer to nutrient-poor soils in e. using organisms to add essential materials... removes harmful substances from
Hyperosmotic body fluids
What will be an ideal response?
The earliest photosynthesizers likely used ____ as electron donors
a. chloride gas b. hydrogen peroxide c. hydrogen sulfide d. magnesium sulfide e. ammonia