The integumentary system is responsible for all but which of the following?
a. protection against bacterial attack
b. protection against abrasion
c. synthesis of certain vitamins
d. blood cell formation
e. control of temperature and prevention of drying out
D
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When iodine intake is too low, production of _____ by the anterior pituitary gland ______
A. TSH; increases B. TSH; decreases C. thyroxine; increases D. triiodothyronine; decreases E. thyroxine; decreases
Which of the following hormones helps the body during long-term stress?
A. epinephrine B. melatonin C. glucocorticoids D. insulin E. calcitonin
Which tool did we use in class to re-root a phylogenetic tree?
A. Consensus tree program B. PHYLIP C. Figtree
Consider the following genetic study involving two autosomal genes. One of these, eye colour, has the dominant allele (R) for red eye colour and the recessive allele (r) for yellow eye colour. The other has the dominant allele (T) leading to paws with thumbs, while the recessive allele (t) codes for paws without thumbs. If these genes are not linked, what should be the phenotype ratio of the offspring produced by a testcross (RrTt ? rrtt)?
a. 1 red-eyed with thumbs: 1 yellow-eyed without thumbs b. 9 red-eyed with thumbs: 3 yellow-eyed with thumbs: 3 red-eyed without thumbs: 1 yellow-eyed without thumbs c. 3 red-eyed with thumbs: 1 yellow-eyed without thumbs d. 1 red-eyed with thumbs: 1 yellow-eyed with thumbs: 1 red-eyed without thumbs: 1 yellow-eyed without thumbs