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TLS Online TPP Program

#Question id: 5003

Fruit fly eyes are of the compound type, structurally very different from the camera-type eyes of mammals. Even the camera-type eyes of mollusks, such as octopi, are structurally quite different from those of mammals. Yet, fruit flies, octopi, and mammals possess very similar versions of Pax-6. The fact that the same gene helps produce very different types of eyes is most likely due to

#Unit 11. Evolution and Behavior

  1. the few differences in nucleotide sequence among the Pax-6 genes of these organisms.

  2. variations in the number of Pax-6 genes among these organisms.

  3. the independent evolution of this gene at many different times during animal evolution.

  4. differences in the control of Pax-6 expression among these organisms.

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TLS Online TPP Program

#Question id: 10324

#Unit 9. Diversity of Life Forms

Which of the following is not true of all horizontally oriented phylogenetic trees, where time advances to the right?
TLS Online TPP Program

#Question id: 9168

#Unit 9. Diversity of Life Forms

Which of the following statements best describes the interaction between fire and ecosystems?
TLS Online TPP Program

#Question id: 12246

#Unit 10. Ecological Principles

The graphs below show that the relationship between atmospheric CO2 and mean global temperature is
TLS Online TPP Program

#Question id: 5270

#Unit 8. Inheritance Biology

In conjugation, transformation, or transduction, the recipient bacteria is most likely to accept donor DNA
TLS Online TPP Program

#Question id: 10813

#Unit 6. System Physiology – Plant

A living cytoplasmic connection penetrate the walls between sieve tube elements and their companion cells; which are often complex and branched on the companion cell side, known as