If you want to buy a colored light bulb for your indoor plants, which color would be the least effective?

a. red
b. blue
c. green
d. yellow
e. orange


ANSWER: c

Biology & Microbiology

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Which of the following are not present in plant cells?

a. endoplasmic reticulum b. Golgi complex c. lysosomes d. mitochondria

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What is clonal selection with regard to B cells? How does it occur?

What will be an ideal response?

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Malignant breast, colon, and lung cancers typically have

A) mutated tumor suppressor genes. B) active oncogenes. C) chromosomal abnormalities. D) activated telomerase. E) All of these

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Nearly half of the pregnancies that end in miscarriage have:a

trisomy of chromosome 21. b. homozygosity for a recessive lethal allele. c. major chromosomal abnormalities. d. Klinefelter syndrome. e. Down syndrome.

Biology & Microbiology