Q6. TRUE or FALSE: Because phenotypic variation is low among children, biomarker
ID: 51981 • Letter: Q
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Q6. TRUE or FALSE: Because phenotypic variation is low among children, biomarkers are relatively simple to find for this age group.
Q7. TRUE or FALSE: A study of 1.2 million fruit flies indicates that the oldest individuals in a population may be genetically different from the rest of the birth cohorts.
Q8. TRUE or FALSE: According to the phylogenetic tree in your book, fish are amniotes and are more closely related to insects than to mammals.
Q9. TRUE or FALSE: It is possible that aging could have evolved, though not through natural selection.
Q10. The main take-away message of the Baltimore Longitudinal Study on Aging was that ___.
Aging varies greatly among individuals
Aging varies greatly among the organ-system affected
For certain variables, certain 80 year olds might score as well as a 50 year old
Both A and C
All of the above.
Q11. Identifying specific ________ will be important to the progress that scientists make toward using personal genomics as a viable tool for biogerontology.
Epigenetic changes
Gene homologs
Non-adaptive traits
Both A and B
All of the above
Q12. In the figure at the left, a is indicating the point at the graph known as ____, while b is indicating _____.
r, k
k, r
intrinsic rate of natural increase, carrying capacity
both a and c
both b and c
Q13. The fact that the mutation rate in germ cell DNA is 1000s of times lower than that seen in somatic cells is evidence that would support ______.
The disposable soma theory
The antagonistic pleiotropy theory
The mutation accumulation theory
All of the above
None of the above
Q14. How would August Weismann’s results from the mouse tail experiment have been different if somatic cells did indeed transmit hereditary properties between generations?
Mice with shorter tails would have more offspring
Mice with cut tails would have fewer offspring
Mice with shorter tails would have offspring with longer tails
Mice with cut tails would have offspring with shorter tails
None of the above
The figure below depicts data from an experiment on C. elegans reared in different environments. Use it to answer questions 15 & 16.
Q15. Based on you understanding of the relationship between life span and reproduction, which population, A (brown), B (violet), or C (blue) would you expect to see individuals reproduce earliest in their life span?
A
B
C
All would be equal
Not enough information
Q16. Based on your understanding of evolutionary theory, which population would you expect to have the most offspring?
A
B
C
All would be equal
Not enough information
Q17. The idea that a gene can be beneficial to an organism early in life, but detrimental later in life, is central to ______.
The disposable soma theory
The antagonistic pleiotropy theory
The mutation accumulation theory
All of the above
None of the above
Q18. The lovely and nutrient-expensive coloration & mating rituals seen in many birds most closely relates to _________.
The disposable soma theory
The antagonistic pleiotropy theory
The mutation accumulation theory
All of the above
None of the above
Explanation / Answer
False
Biomarkers can be found in all age groups. There is an ethical debate going around for a while now relating to biomarkers from children
True
The oldest individual can be genetically different from birth cohorts if the cohorts evolved in a way to adapt well to present environment.
False
Fish are not amniotes. They may lay free floating eggs.
True
Several theories on aging suggest that it evolved with time. However the biggest question that still remains unanswered is that what possible benefits could aging bring to an individual in order to evolve through time.
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