A significant contribution of intestinal bacteria to human nutrition is the benefit of bacterial:

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#Question id: 7763

#5. Developmental Biology

Two major sources of mutation are radiation and reactive oxygen species (ROS).The reactive oxygen species hypothesis for aging postulates that 

1) Senescence results from the accumulation of DNA, lipid, and protein damage inflicted by ROS of mitochondrial origin; and

2) Mitochondria of long-lived species should produce high ROS than do mitochondria of short-lived species.

3) the capacity of mitochondria to consume ROS might distinguish long-lived species from short-lived species, rather than differences in ROS generation. 

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#Question id: 10595

#10. Ecological Principles

If the per capita birth rate (b) and per capita death rate (d) in one year is 0.80 and 0.20 respectively. if the initial population size is 600, what will be net change (dN) in population size in one year

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#Question id: 4719

#8. Inheritance Biology

When a trait exhibits complete co-dominance rather than complete dominance, a cross between heterozygote results deviation of following;

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#Question id: 4821

#8. Inheritance Biology

What are frequency of recombination  if one cell carry out cross over every 50 cell undergoes meiosis ?

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#Question id: 12567

#10. Ecological Principles

Which of the following is true about the current research about forest fragmentation?