Several categories of risk of species extinction have been defined. A species can be determined as critical endangered if there is considered to be

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#Question id: 12934

#I Life Science/ Life Sciences Group – I-V

Reverse transcriptase enzyme is isolated from____

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#Question id: 6966

#SCPH28 | Zoology

During gastrulation in the frog, the very first cells to move into the interior of the embryo through the blastopore come from the surface layer of cells in the marginal zone; they will become:

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#Question id: 9271

#SCPH05 I Biotechnology

Chlorophylls a and b are abundant in green plants, and c and d are found in some protists and cyanobacteria. A number of different types of bacteriochlorophyll have been found; which type of chlorophyll is the most widely distributed, shows the distribution of pigments in different types of photosynthetic organisms;

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#Question id: 11330

#SCPH28 | Zoology

Bio geographers have noted that the tropics have more terrestrial species than temperate regions. Which of the following is NOT a plausible explanation for this pattern?

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#Question id: 4342

#SCPH06 I Botany

Suppose an experimenter becomes proficient with a technique that allows her to move DNA sequences within a prokaryotic genome. If a researcher moves the operator to the far end of the operon, past the transacetylase (lacA) gene, which of the following processes would likely occur when the cell is exposed to lactose?