Aluminum is toxic to plants because it
A) destroys chlorophyll in the leaves, reducing the rate of photosynthesis.
B) inhibits production of pollen, reducing the rate of reproduction.
C) damages the roots, reducing nutrient uptake.
D) inhibits mitosis within the meristem tissues, reducing growth of the stems.
C
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In a one D process, how many D values would it take to reduce a population of 1010 cells to one survivor?
A. 2 B. 4 C. 5 D. 10
When both dominant and recessive alleles are present within a single nucleus, the organism is for the trait
a. diploid b. haploid c. homozygous d. heterozygous
Which of the following pairs of researchers determined whether or not DNA replications is conservative, semiconservative, or dispersive?
A. Hershey and Chase B. Meselson and Stahl C. Beadle and Tatum D. Watson and Crick
Fingernails are a component of the ________ system
A) respiratory B) integumentary C) muscular D) skeletal