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Magnetic field reversals (as represented in the figure above) have been occurring roughly every 200,000 years. If you were to observe iron crystals embedded in oceanic geology that were pointing neither northward or southward, based on plate tectonic theory, what would potentially explain this?
Which piece(s) of evidence offer support of plate tectonic theory being driven by the convection current hypothesis rather than the "expanding Earth" hypothesis (Google it)? Explain your thinking.
Assuming that plate tectonics and continental drift is in fact occurring, as explained by the convection current hypothesis, what is likely true with regards to the relative ages of the Atlantic and Pacific oceans? Might you expect there to be a difference in the diversity of Coral Reef and fish species in these two Oceans? Explain.
What piece of evidence would actually allow us to measure the actual rate at which continental drift is occurring?
List the organelles and structures found in cells. Pick one organelle and describe the role it plays in the life of the cell. In your description, comment on what may happen to the cell if the organelle did not function properly. Remember to cite ..
What effect would the following mutations have on the expression of the enzyme coding sequences of the tryptophan operon. Select the letter on the right that describes the effect.
Three genes in the soybean plant, Glycine max, are being studied for their linkage relationship. The genes are as given:
What procedure ensures that pre-mRNA processing is co-transcriptional? Disucss ow are all three steps of processing sequentially controlled?
Discuss the principle of segregation? Explain why is it important? Determine the concept of dominance? How does dominance differ from incomplete dominance.
You have two true-breeding tomato plants. One is tall (T) with a bristly stem (B) and white flowers (r). The other is short (t) with a smooth stem (b) and red flowers (R).
Which compartments of a cell is associated with each of the following: clathrin, calcium ions in a skeletal muscle cell, dolichol phosphate, ribonuclease and lipase, digitalis, LDL receptors, COPI proteins, COPII proteins, unbound SRPs.
The genome of virus SV40 is a circular double-stranded DNA molecule 5 kb long. A 1 kb region is amplified by PCR for four cycles. What fraction of total DNA does the target sequence constitute.
What are the roles of plasmodesmata and aquaporins. In the presence of the galactose derivative 6-O-benzyl-D-galactose, the curve is shifted to the right. What variety of agent is 6-O-benzyl-D-galactose.
A transcriptional unit of rRNA with strands of nascent rRNA getting progressively larger as they get closer to the end of the unit, a structure that looks much like an arrowhead. What is the significance of the space between the two arrowheads? Pl..
DNA footprinting allows isolation of DNA sequences that bind specific transcription factors. Describe an experimental protocol to identify transcription factors that bind to an isolated DNA sequence.
Explain the events required for the activation of T lymphocytes. How can controlling the receptors involved can be used as experimental treatments for autoimmune diseases?
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