The slender stalk that connects the flattened leaf blade to the stem in most eudicots is the
A. vein.
B. stele.
C. receptacle.
D. meristem.
E. petiole.
Answer: E
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A newborn is identified as having sickle-cell anemia. While both parents are healthy, a screening of both parents will most likely reveal:
A. both mother and father are carriers of a mutant ? chain gene. B. only one parent has a mutant ? chain gene since mutation is dominant. C. both mother and father are carriers of a mutant ? chain gene. D. only one parent has a mutant ? chain gene since mutation is dominant. E. both parents carry a mutant hemoglobin gene and are highly susceptible to malaria.
Early-onset Alzheimer's disease, some forms of epilepsy, and one type of ALS are associated with
genes on chromosome number a. 5 b. 13 c. 18 d. 21 e. 22
Compare and contrast the structure, physical characteristics, and biological functions of two of the following: fats,
steroids, and phospholipids. What will be an ideal response?
During osmosis, water will move _______ its own concentration gradient until equilibrium has been reached.
Fill in the blank(s) with the appropriate word(s).