TLS Online TPP Program

#Question id: 9181


Turnover of water in temperate lakes during the spring and fall is caused by which of the following?

#Unit 9. Diversity of Life Forms
  1. warm, less dense water layered at the top
  2. cold, more dense water layered at the bottom
  3. a distinct thermocline between less dense, warm water and cold, dense water
  4. the changes in the density of water as seasonal temperatures change
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TLS Online TPP Program

#Question id: 6975

#Unit 5. Developmental Biology

Which one of the following genes was NOT part of transcription factors used to generate induced pluripotent stem (iPS) cells from mouse skin fibroblasts?

TLS Online TPP Program

#Question id: 6977

#Unit 5. Developmental Biology

Cartilage (bone-forming tissue) and connective tissue of the vertebrate limb form from:

TLS Online TPP Program

#Question id: 6978

#Unit 5. Developmental Biology

Removal of the apical ridge leads to

TLS Online TPP Program

#Question id: 7286

#Unit 5. Developmental Biology

Which of the floral whorls is affected in apetala 3/pistillata (ap3/pi) mutants?

TLS Online TPP Program

#Question id: 7290

#Unit 5. Developmental Biology

Following figure regarding to regulatory network in the Arabidopsis shoot meristem stem-cell niche.

A. The transcription factor WUS is synthesized in the cell A and moves via plasmodesmata into cell B, where one of its functions is to induce expression of the CLV3.

B. The transcription factor CLV3 is synthesized in the cell A and moves via plasmodesmata into cell B, where one of its functions is to induce expression of the WUS.

C. Secreted CLV3 protein from cell B binds to the receptor protein kinase on the surface of cell A; there, it activates a signal that represses WUS transcription.

D. Secreted WUS protein from cell B binds to the receptor protein kinase on the surface of cell A; there, it activates a signal that represses CLV3 transcription.

Which of the following combination is correct?

TLS Online TPP Program

#Question id: 7292

#Unit 5. Developmental Biology

How is plant cell cytokinesis different from animal cell cytokinesis?