Which organ system collects and returns some tissue fluid to the bloodstream and defends the body against infection and tissue damage?

1.Circulatory system
2.Endocrine System
3.Lymph system
4.Urinary system


3

Biology & Microbiology

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Which of the following is not an example of euploidy?

A. Tetraploid B. Polyploid C. Triploid D. Diploid E. Aneuploid

Biology & Microbiology

A molecular biologist is interested in purifying a recombinant protein by His-tagging, but the protein and vector both lack histidine residues. In this case, the molecular biologist could use which of the following technique(s) to achieve purification?

A. Add a 6xHis-tag to the C-terminus of the protein B. Amplify the histidine-encoding sequence by PCR and add it to the gene of interest C. Add a series of histidine residues to the N-terminus of the protein D. All of the choices are correct.

Biology & Microbiology

Triglyceride (fat) storage

What will be an ideal response?

Biology & Microbiology

Which class is composed mostly of freshwater parasites called leeches?

a. Hirudinea b. Oligochaeta c. Cestoda d. Polychaeta

Biology & Microbiology