A researcher is using molecular phylogenetic techniques to determine the evolutionary relationships of a large set of animal species. Which type of species are most likely to have been wrongly classified based on morphology alone?
A. Parasitic species
B. Terrestrial species
C. Species with spiral development
D. Bilateral species
E. Aquatic species
Answer: A
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DNA photolyase, in the presence of visible light, can repair DNA damage due to ultraviolet radiation.
Answer the following statement true (T) or false (F)
Answer the following statements true (T) or false (F)
1. Phylogenetic analyses of some vertebrate mineralcorticoid and glucocorticoid receptors and their ligands has suggested that the hormones evolved prior to their receptors. 2. Vasotocin is present in non-mammalian vertebrates and shares structural and functional properties with mammalian antidiuretic hormone and oxytocin. Through these similarities it has been suggested that vasotocin could be the ancestral precursor to the posterior pituitary hormone in vertebrates. 3. Vitamin D is a hormone produced in part by exposure to sunlight. 4.
If two genes are almost always found in the same gamete,
a. they are located close together on the same chromosome. b. they are located on nonhomologous chromosomes. c. they are located far apart on the same chromosome. d. they are found on the sex chromosome. e. they are found on the autosome.
It is a fact that enzymes are highly specific and will only catalyze one or a few reactions. Can you
think of a benefit that is derived from such specificity? (i.e. What would happen if most biochemical reactions were catalyzed by the same enzyme?) What will be an ideal response?