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TLS Online TPP Program

#Question id: 11499

Biologists have long been aware that the defunct kingdom Protista is paraphyletic. Which of these statements is both true and consistent with this conclusion?

#Unit 9. Diversity of Life Forms
  1. Many species within this kingdom were once classified as monerans.
  2. Animals, plants, and fungi arose from different protist ancestors.
  3. The eukaryotic condition has evolved only once among the protists, and all eukaryotes are descendants of that first eukaryotic cell.
  4. Some protists, all animals, and all fungi share a protist common ancestor, but these protists, animals, and fungi are currently assigned to three different kingdoms.
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TLS Online TPP Program

#Question id: 19560

#Unit 12. Applied Biology

The toxin fragments arc believed to bind to specific high-affinity receptors present in the brush border of 
TLS Online TPP Program

#Question id: 19561

#Unit 12. Applied Biology

As a result, the brush border membranes develop pores, most likely nonspecific in nature, permitting ______ into the epithelial cells of ions and water, which causes their swelling and eventual lysis.
TLS Online TPP Program

#Question id: 19562

#Unit 12. Applied Biology

It has been suggested that interaction of the toxin fragment with the receptor facilitates proteolytic removal of toxin a helix, which triggers toxin oligomerization that leads to 
TLS Online TPP Program

#Question id: 19563

#Unit 12. Applied Biology

It was believed that lysis of epithelial cells leads to death of the affected larvae due to 
TLS Online TPP Program

#Question id: 19684

#Unit 13. Methods in Biology

Which of the following is used to measure the electrical activity of the heart?
TLS Online TPP Program

#Question id: 19685

#Unit 13. Methods in Biology

The P-waves of ECG indicates: