What role does the plant cell wall compound lignin play in the adaptation of plants to a land environment?
What will be an ideal response?
Lignin is a very tough compound. It adds strength and rigidity to cells that transport water and cells that support the plant vertically.
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Most commonly, individuals of a population show a ________ distribution through their habitat
Fill in the blank(s) with correct word
Which one of the structures below does NOT develop during neurulation?
A. the archenteron B. cells that form pigment C. the neural crest D. the central nervous system
The oxygen required by cellular respiration is reduced and becomes part of which molecule?
a. ATP b. H2O c. pyruvate d. CO2
Factors that contribute to overall genome size include:
a. small genetic elements capably of self-catalyzing their movement. b. selection on cell size. c. selection on replication speed. d. A and B. e. A, B, and C.