Erwin and Scott used an insecticidal fog to knock down insects from the top section of a L. seemannii tree. The researchers identified over 900 species of beetles among the individuals that fell. Erwin also projected that this entire tree from top to bottom is host to about 600 arthropod species that are unique to this tree species and not found on any other tree species. There are approximately 50,000 species of tropical trees. Although it could not be entirely accurate, what would be the best way to estimate the total number of arthropod species?

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#Question id: 31356

#Unit 13. Methods in Biology

Which one of the following options represents a combination of terms that are matched INCORRECTLY? 

A. ddNTPs : Cleavage method of DNA sequencing

B. South Western blot: Physical interaction between DNA and proteins

C. 5’ to 3’ exonuclease activity: proof reading polymerase for PCR

D. Yeast two hybrid system: Interaction between proteins

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#Question id: 176

#Unit 1. Molecules and their Interaction Relevant to Biology

A peptide has the sequence Glu–His–Trp–Ser–Gly–Leu–Arg–Pro–Gly. What is the net charge of the molecule at pH 3

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#Question id: 24656

#Unit 2. Cellular Organization

What is the “signature sequence” that is highly conserved in all K+ channels?

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#Question id: 17994

#Unit 8. Inheritance Biology

Consider a heritable autosomal disease with an incidence in the population of 1 per thousand. On average, individuals with the disease have 80% as many children as the population average. In answering the various parts of this question, assume that mating is random. What mutation rate would be required to maintain the observed incidence of the disease in the population if the disease is dominant?

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#Question id: 28184

#Unit 5. Developmental Biology

If cells are removed from the embryo, the remaining cells can regulate and compensate for the missing part, from these mode of specification is known as____