Under conditions of normal renal function, which of the following is true of the concentration of urea in tubular fluid at the end of the proximal tubule?

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#Question id: 10719

#10. Ecological Principles

Five Hypotheses Explain How Species Richness Affects Community Services, Following statement are given

A) Community services decline with decreased species richness in a stepwise fashion.

B) Species that play the same roles in a community can compensate for each other if some are lost under particular conditions

C) Species richness declines even slightly from its natural levels, community services are reduced immediately

D) Community services change as the number of species increases or decreases, but that the direction of change is not predictable.

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#Question id: 2965

#2. Cellular Organization

In a diploid cell with 5 chromosome pairs (2n = 10), how many centromeres will be found in a nucleus at G2 of the cell division cycle?

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#Question id: 23398

#Aptitude

There are five books A, B, C, D and E. The book C lies above D, the book E is below A and B is below E. Which is at the bottom?

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#Question id: 425

#1. Molecules and their Interaction Relevant to Biology

Which is usually the slowest way to regulate a reaction in a metabolic pathway?

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#Question id: 18006

#11. Evolution and Behavior

During which geological period origin, first forests; lands plants well established?