A researcher would like to map the location of galE and trpA genes in a new species of bacterium that appears to be closely related to E. coli. He decides to use cotransduction, and generatesnappropriate donor and recipient strains. He is disappointed when cotransduction is not seen in his experiement. What is the most reasonable explanation for this situation?

#Question id: 11647

#Unit 7. System Physiology – Animal

After menopause, hormone replacement therapy with estrogen-like compounds is effective in preventing the progression of osteoporosis. What is the mechanism of their protective effect?

#Question id: 11648

#Unit 7. System Physiology – Animal

Within minutes following a normal delivery, flow through the foramen ovale decreases dramatically. What is the cause of this change?

#Question id: 11651

#Unit 10. Ecological Principles

Succession on a newly exposed site that was not previously occupied by soil and vegetation refers to

#Question id: 11652

#Unit 10. Ecological Principles

The sequence of changes initiated by disturbance is called succession, and the ultimate association of species achieved is called

#Question id: 11653

#Unit 10. Ecological Principles

Given some characteristics of the climax community

i) Tolerate its own reactions

ii) Tends to become mesic

iii) Less stable

iv) Complex stratification

v) Simple food web

vi) Less mutualism

vii) Gross production is equals to community respiration

viii) Net community production is zero

Which of the following combination shows the characteristics of climax community?

#Question id: 11654

#Unit 10. Ecological Principles

Succession start from the water body and continuos in community dyanamics, changes species composition as well as changes in structure also. Which one is the correct composition of hydrosere process?