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TLS Online TPP Program

#Question id: 7191

In tunicate embryo, Presumptive endoderm originates from the vegetal A4.1 and B4.1 blastomeres. The specification of these cells coincides with the localization of β-catenin. Which of the following statement is incorrect?

#Unit 5. Developmental Biology
  1. Inhibition of β-catenin results in the loss of endoderm and its replacement by ectoderm in the tunicate embryo.
  2. increasing β-catenin synthesis causes an increase in the endoderm at the expense of the ectoderm (just as in sea urchins).
  3. The β-catenin transcription factor appears to function by activating the synthesis of the homeobox transcription factor Lhx3. Inhibition of the lhx3 message prohibits differentiation of endoderm.
  4. During the differentiation of endoderm β-catenin inhibits the synthesis of Lhx3. Expression of Lhx3 message causes differentiation of ectoderm.
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TLS Online TPP Program

#Question id: 8909

#Unit 9. Diversity of Life Forms

Which of the following terms or structures is properly associated only with animals?
TLS Online TPP Program

#Question id: 8910

#Unit 9. Diversity of Life Forms

Both animals and fungi are heterotrophic. What distinguishes animal heterotrophy from fungal heterotrophy is that only animals derive their nutrition
TLS Online TPP Program

#Question id: 8911

#Unit 9. Diversity of Life Forms

The larvae of some insects are merely small versions of the adult, whereas the larvae of other insects look completely different from adults, eat different foods, and may live in different habitats. Which of the following most directly favors the evolution of the latter, more radical, kind of metamorphosis?
TLS Online TPP Program

#Question id: 8912

#Unit 9. Diversity of Life Forms

Both animals and fungi are heterotrophic. What distinguishes animal heterotrophy from fungal heterotrophy is that only animals derive their nutrition
TLS Online TPP Program

#Question id: 8913

#Unit 9. Diversity of Life Forms

The larvae of some insects are merely small versions of the adult, whereas the larvae of other insects look completely different from adults, eat different foods, and may live in different habitats. Which of the following most directly favors the evolution of the latter, more radical, kind of metamorphosis?
TLS Online TPP Program

#Question id: 8914

#Unit 9. Diversity of Life Forms

Which of the following is (are) unique to animals?