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TLS Online TPP Program

#Question id: 9242

Eutrophication is often caused by excess limiting-nutrient runoff from agricultural fields into aquatic ecosystems. This process results in massive algal blooms that eventually die and decompose, ultimately depleting the dissolved oxygen, killing large numbers of fish and other aquatic organisms. Predict which of the following human actions would best address the problem of eutrophication near agricultural areas?

#Unit 9. Diversity of Life Forms

  1. After each eutrophication event, remove the dead fish and invertebrates to place on agricultural fields instead of fertilizer.

  2. Determine which limiting nutrient is responsible for the algal bloom, and use other fertilizers to apply to crops.

  3. Remove the algae before it dies and decomposes to prevent eutrophication from occurring.

  4. Determine critical nutrient loads required for certain crops, and do not exceed this amount during fertilizer application.

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TLS Online TPP Program

#Question id: 15420

#Unit 5. Developmental Biology

signal from the inducing cell is necessary for initiating new gene expression in the responding cell. Without the inducing cell, the responding cell is not capable of differentiating in that particular way, phenomena known as:
TLS Online TPP Program

#Question id: 15419

#Unit 5. Developmental Biology

Doris Taylor’s research group used detergents to remove all the cells from a cadaveric rat heart, which leaves behind the natural extracellular matrix. An extracellular matrix scaffold can promote the differentiation and rebuilding of a beating heart. The researchers then infused this ECM scaffold with cardiomyocytes. Now these cells differentiated and organized into a functionally contracting “recellularized” heart. Which of the following statement is correct?
TLS Online TPP Program

#Question id: 15418

#Unit 5. Developmental Biology

In which type of interaction, the responding tissue has already been specified and needs only an environment that allows the expression of particular traits?
TLS Online TPP Program

#Question id: 15417

#Unit 5. Developmental Biology

Sequence of amphibian lens induction postulated by experiments on embryos of the frog Xenopus laevis ; EXCEPT
TLS Online TPP Program

#Question id: 15416

#Unit 5. Developmental Biology

Which of the following statements are regarding to lens induction in xenopus is incorrect?
TLS Online TPP Program

#Question id: 10147

#Unit 6. System Physiology – Plant

Which of the following enzymes is regulated by supramolecular assembly ?