Select the true statements describing why cladistics may not always be the best method for reconstructing phylogenies based on data from the DNA genome. (Select all that apply.)A) The rate of evolution of the DNA genome is rapid.B) The assumptions of the principle of parsimony are not always met.C) Homoplasy often dominates the data sets.D) The number of character states for DNA is large.
What will be an ideal response?
A, B, C
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DNA isolated from Aspergillis has an adenine content of 25%. Based upon this information, what is the %G + C within the Aspergillis DNA?
A) 0% B) 25% C) 50% D) 75% E) The answer cannot be determined from this information.
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.
The human temperature set point typically ____
a. ranges from about 96.0?F to about 99.9?F b. stays right at about 98.6?F c. stays right at about 96.8?F d. ranges from about 98.0?F to about 99.5?F e. ranges from about 94.0?F to about 99.0?F
Why was Earth's early atmosphere devoid of oxygen?
What will be an ideal response?