The graph below shows  the  growth  rates  of  populations  of  bacteria  that  have  evolved  for  many  generations  at different culture temperatures (25°C, 30°C, and 35°C). Each population grows over only a limited range of temperatures (its thermal niche), which are bounded by its critical thermal limits. Within this range, growth rate increases with temperature up to a maximal value and then declines rapidly with increasing temperature. Growth rates are known to be the major determinant of fitness for these bacteria.

Which of the following is true concerning the thermal dependence of growth rate   between 25°C and 30°C in these populations?

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#Question id: 14754

#Unit 6. System Physiology – Plant

Plant cells have several internal compartments, each of which can differ in its ionic composition. The cytosol and the vacuole are the most important intracellular compartments that determine the ionic relations of plant cells, Ion concentrations in the cytosol and the vacuole are controlled by passive (dashed arrows) and active (solid arrows) transport processes

  

Which of the following statement INCORRECT from the above figure;

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#Question id: 14755

#Unit 6. System Physiology – Plant

Any active transport mechanism that results in the movement of a net electric charge will tend to move the membrane potential away from the value predicted by the Goldman equation. Such a transport mechanism is called

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#Question id: 14756

#Unit 5. Developmental Biology

A series of mitotic divisions whereby the enormous volume of egg cytoplasm is divided into numerous smaller, nucleated cells. These cleavage-stage cells are called as:

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#Question id: 14757

#Unit 5. Developmental Biology

Which of the following events are responsible for transition from fertilization to cleavage ?

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#Question id: 14758

#Unit 5. Developmental Biology

If contractile ring is disrupted during cleavage, which of the following process stop?

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#Question id: 14759

#Unit 5. Developmental Biology

Which of the following mechanical agent creates cleavage furrow during cleavage?