Leaf chlorosis is not likely to be caused by a deficiency in ____

a. nitrogen
b. magnesium
c. iron
d. zinc
e. boron


ANSWER: e

Biology & Microbiology

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During animal development, a fertilized egg divides to form a ball of undifferentiated cells called a:

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Embryonic stem cells derived from blastocysts are pluripotent, and therefore useful in stem cell research because they ________

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Red-green color blindness is an X-linked recessive trait in humans. A color-blind woman and a man with normal vision have a son. What is the probability that the son is color blind?

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