The regulation of milk release, water balance and uterine contractions during childbirth are mediated
by the ____ gland.
a. parathyroid
b. pineal
c. anterior pituitary
d. posterior thyroid
e. posterior pituitary
E
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Mycobacterium and Nocardia are different from most gram-positive bacteria in that their cell walls
A. contain unique, waxy lipids. B. contain more peptidoglycan. C. are easily decolorized during staining. D. contain a layer of lipopolysaccharide.
Which of the following is NOT an enzyme?
A) Lactose B) Amylase C) Catalase D) Protease E) Isomerase
In a population of finches, birds with small, thick beaks can efficiently crack the seeds of one species of plant, while birds with long, thin beaks can efficiently crack the seeds of another plant species. Birds with medium-sized beaks cannot efficiently eat either kind of seed. After many generations, the distribution of beak size in these birds will be _______________ because of ___________________.
a) normal; stabilizing selection b) skewed to the left; directional selection c) skewed to the right; directional selection d) normal; environmental pressures e) "U"-shaped, with peaks at the low and high extremes of beak size; disruptive selection
Which type of nutrient uptake involves the engulfment of small dissolved molecules into vesicles?
A. active transport B. pinocytosis C. receptor mediate endocytosis D. facilitated diffusion