TLS Online TPP Program

#Question id: 1121


Which of the following provides the best evidence that cell-signaling pathways evolved early in the history of life?

#XL - Q Biochemistry
  1. Cell-signaling pathways are seen in "primitive" cells such as bacteria and yeast.

  2. Bacteria and yeast cells signal each other in a process called quorum sensing.

  3. Signal transduction molecules identified in distantly related organisms are similar.

  4. Most signals in all types of cells are received by cell surface receptors.

More Questions
TLS Online TPP Program

#Question id: 11010

#XL - T Zoology

Which of the following best explains how sympathetic stimulation affects the heart?

TLS Online TPP Program

#Question id: 11047

#XL - R Botany

As plants absorb water from the soil, they deplete the soil of water near the surface of the roots, This depletion due to

TLS Online TPP Program

#Question id: 11048

#XL - R Botany

In vascular plants, phloem is the living tissue that transports the soluble organic compound made during photosynthesis in the form of sugar, The phloem tissue is made up of cells called phloem elements. Which of the following given phloem elements are directly involved in translocation?

TLS Online TPP Program

#Question id: 11049

#XL - R Botany

Match the CORRECT combination of the phloem elements with its function.

            PHLOEM ELEMENTS                                                  FUNCTIONS

P) sieve tube elements                                    i) for protection and strengthening of the tissue

Q) sieve cells                                                  ii) store and release food molecules

R) companion cells                                        iii) food translocation in angiosperm

S) Phloem parenchyma cells                          iv) latex containing cells

T) Phloem fibers and sclereids                       v) help in flow of solute and show high, metabolic activity

U) laticifers                                                     vi) food translocation on gymnosperm

TLS Online TPP Program

#Question id: 11050

#XL - R Botany

Three dimensional reconstructions of Arabidopsis sieve plates using a staining technique that can be used to image entire plant organs and Open sieve pores are visible as well as callose plug are also visible which technique used to analyze

TLS Online TPP Program

#Question id: 11076

#XL - T Zoology

Which of the following will decrease pulmonary blood flow resistance?