TLS Online TPP Program

#Question id: 3327


Birds that are brood parasites lay eggs in the nests of other birds. This is a successful strategy for the parasite only if

#Unit 9. Evolution & Diversity of Life Forms
  1. the host bird and the brood parasite bird species are similar in size

  2. the parasite removes all the host eggs

  3. host birds cannot discriminate between their eggs and those of the parasite

  4. the parasite chicks are much smaller than those of the host bird species

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TLS Online TPP Program

#Question id: 31366

#Unit 5. Developmental Biology

Which one of the following mRNAs can rescue the ventral structures of dorsalized Xenopus embryo when injected into it?

TLS Online TPP Program

#Question id: 31370

#Unit 5. Developmental Biology

Which would lead to a ventralized embryo in drosophila? 

TLS Online TPP Program

#Question id: 31372

#Unit 5. Developmental Biology

Following statements are regarding lens induction in xenopus. choose incorrect statement?

TLS Online TPP Program

#Question id: 31378

#Unit 5. Developmental Biology

The following experimental manipulations were carried out with Xenopus embryo.
Manipulation X: Exposure to UV radiation leading to the failure of cortical rotation.
Manipulation Y: Gastrulae treated with lithium chloride.

The following statements were made with respect to the above manipulations. Which one of the following represents correct statement?

TLS Online TPP Program

#Question id: 31379

#Unit 5. Developmental Biology

The cadherin catenin complex is extremely important during compaction from a morula to the blastula. Transition of early embryonic cells into a blastula differed depending on the presence or absence of calcium ions. In addition, an investigator blocked the expression of β-catenin using vivo morpholinos to detect its effect simultaneously on compaction. Which one of the following conditions will lead to the most successful transition of the morula into the blastula?



TLS Online TPP Program

#Question id: 31384

#Unit 5. Developmental Biology

In drosophila, the third thoracic segment is transformed into another second thoracic segment due to: