Propose an appropriate solvent to be used in the extraction of photosynthetic pigments from

chloroplasts. Explain your choice. What will be an ideal response?


Concepts to Consider: A suitable solvent would be any hydrophobic organic solvent such as acetone
or petroleum ether. The reason for this is that the pigments are hydrophobic and are embedded in a
hydrophobic thylakoid membrane

Biology & Microbiology

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Four of the five groups listed below are in the domain Eukarya. Select the exception

a. plants b. protists c. animals d. fungi e. bacteria

Biology & Microbiology

Which of the following statements is true of selective toxicity?

A) Selective toxicity takes advantage of structural similarities between host and pathogen. B) To be effective, an antimicrobial agent must be more toxic to the patient than the pathogen. C) Selective toxicity takes advantage of differences in metabolic rates of the host and pathogen. D) Selective toxicity damages only pathogenic bacteria and not beneficial bacteria. E) Selective toxicity takes advantage of structural and/or metabolic differences between host and pathogen.

Biology & Microbiology

Explain how the resulting phenotypic ratios from Mendel's dihybrid cross assisted him in framing his Second Law

What will be an ideal response?

Biology & Microbiology

In vertebrates, sympathetic nerves (e.g., those responsible for the fight-or-flight response) are part of the (select all correct choices):

A. autonomic (involuntary) nervous system. B. peripheral nervous system (PNS). C. central nervous system (CNS).

Biology & Microbiology