This simple plant tissue consists of dead cells

with thick, lignified cell walls that function in
support. This plant tissue is



a. parenchyma.
b. sclerenchyma.
c. collenchyma.
d. xylem.
e. phloem


B

Biology & Microbiology

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The "Anthropocene Period":

A. is so named to reflect the impact of humans on the planet. B. is Latin for "modern era." C. refers specifically to the period of time following the industrial revolution. D. is so named to reflect increasing global surface temperatures. E. refers to the period when the earliest primate ancestors appeared in the fossil record.

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Describe the supporting evidence for the endosymbiotic theory

What will be an ideal response?

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Postzygotic reproductive isolation prevents

A. fertilization. B. formation of gametes by one of the parents. C. male gametes from joining with female gametes. D. All of the answer choices are correct. E. genetic exchange between populations by selecting against hybrid offspring.

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This protein functions optimally in high H+ concentrations.

a. Keratin b. Hemoglobin c. Actin d. Insulin e. Pepsin

Biology & Microbiology