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Topic A: Researching Human Ancestry
Fully answer the two questions below. Please use evidence to support your answers; and cite all sources used in your answers.
(1) What are the advantages of using mitochondrial DNA and Y-chromosome DNA to trace human ancestries? How do molecular genetics complement or dispute the fossil (morphological) evidence of human evolution? Please explain your answer and provide specific examples.
(2) Do Neanderthals represent a direct ancestor to modern humans? What does the recent genetic evidence indicate about the role of Neanderthal as human ancestor?
Describe fully two ways photosynthesis and respiration are similar to each other and two ways they are different. (Be sure to actually compare and contrast the two, not simply list the similarities and differences.)
Explain why is glycine often found in loops of protein rather than in secondary structures such as beta-sheets and alpha helices?
What is the central dogma? And what are it's three main molecular components?
Explain a series of experiments you would undertake to find if your favourite brand of the peanut butter is carcinogenic.
In a co-evolved predator-prey relationship, does predation rate operate under directional selective pressure or stabilizing selective pressure?
A female neonate is noted at birth to have a gross deformity of her lower back. Examination of the subcutaneous scar reveals disorganized neural tissue with entrapment of nerve roots. What is the appropriate diagnosis?
The lycophytes, sphenophytes, and ferns were once the giants of the plant kingdom and dominated the landscape. Explain why they are presently restricted to certain habitats and are relatively small in stature.
A surgical procedure formerly used to alleviate severe intractable pain in cancer patients is called an anterolateral cordotomy. When performed properly, this procedure cuts the axons contained in the lateral spinothalamic tract.
Insulin is a secreted protein made by islet cells in the pancreas. The gene INS encodes the precursor for insulin protein. Explain the flow of data from the INS gene.
Assume you have thirty ml of liquid culture with absorbance of 0.894. You need 20 ml final volume of a culture with an absorbance of 0.500.
Which of the following is TRUE of fungi?
Practitioners of homeopathic medicine believe that toxic substances, once appropriately diluted, can have healing effects, usually having the opposite effect of the symptoms of the original toxic compound. There are currently over 3,000 homeopathi..
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