Question

Comparison of Lignin-Associated Genes Across Photosynthetic Organisms

Use the passage to answer the question.

The genome of a pine, a gymnosperm, is analyzed for the number of genes specific for the biosynthesis of lignin. Based on the results presented in the table, which is the estimated number of genes that should be expected from the analysis?

between 0 and 9

Obetween 10 and 29

Obetween 30 and 59

more than 60

(1 point)

Approximate number of genes associated with an enzyme unique to lignin biosynthesis

0

0

In a study comparing the genomes of photosynthetic organisms, scientists identified genes specific to the synthesis of lignin. The resulting data are presented in the table.

Group

Diatoms

Green algae

12

38

55

Bryophytes

Lycophytes

Dicols

53

Monocots

Organism

Phaeodactylum

Volvox

A moss

Spike moss

Rice

Poplar tree

Answer 1

Based on the table provided, the estimated number of genes specific for the biosynthesis of lignin in the genome of a pine should be between 30 and 59. This is based on the number of lignin-associated genes found in related photosynthetic organisms such as dicots and monocots in the table.