Which of the following represents a dihybrid cross?
A. Ss x ss
B. AAbb x Aabb
C. ff x ff
D. Gg x gg
E. AAbb x aaBB
Answer: E
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A. connective; ground B. nervous; vascular C. epithelial; dermal D. connective; epithelial
As soils dry, root cells at the root tip produce _________, which ____________
A. abscisic acid; stimulates root elongation B. abscisic acid; suppresses root elongation C. ethylene; stimulates root elongation D. ethylene; suppresses root elongation E. auxin; stimulates root elongation
When erythrocytes are old or die, how are they removed from the blood stream?
1.The liver filters them out. 2.They break into small particles and are cleared out by the kidneys. 3.They dissolve into liquid and circulate in that form in the blood. 4.They are attacked by macrophages and removed. 5.They remain intact, dead cells and are filtered out by the kidneys.
Which of the following is NOT a fatsoluble vitamin?
a. vitamin B b. vitamin K c. vitamin D d. vitamin A