Describe an aspect of the data below that is consistent with the rate-of-living hypothesis for senescence and an aspect of the same data that argues against the hypothesis
What will be an ideal response?
ANS:
For: Life span is inversely correlated with metabolic rate. Against: At a given metabolic rate, birds live longer than mammals.
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Answer the following statements true (T) or false (F)
1. The complement strands of DNA have the same exact nitrogen base sequence, providing the semiconservative replication needed by cells. 2. Any change in a cell's DNA sequence is a mutation. 3. Change in a cell's DNA sequence is a common occurrence in the process of replication. 4. Each newly replicated molecule of DNA contains one conserved strand from the original DNA molecule. 5. A replicated chromosome consists of two sister chromatids.
Crossing over is important because it
1.eliminates a bad allele from being in an egg or sperm cell. 2.increases the variation in the DNA of eggs and sperm. 3.increases the number of alleles in the eggs and sperm. 4.changes the alleles for traits on a chromosome.
Lagging strand synthesis in eukaryotes involves Okazaki fragments that are shorter than those in bacterial replication.
Answer the following statement true (T) or false (F)
Meiosis II typically produces _____ cells, each of which is _____.
Fill in the blank(s) with the appropriate word(s).