In a root nodule, the gene coding for nitrogenase _____
A) is inactivated by leghemoglobin
B) is absent in active bacteroids
C) is found in the cells of the pericycle
D) protects the nodule from nitrogen
E) is part of the Rhizobium genome
Answer: E
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The organisms that make up lichen:
a. benefit from each other b. infect human body surfaces c. increase the surface area of plant partners d. obtain sugar by fungal photosynthesis e. are plant parasites
The term development refers to all the changes that occur during the life cycle of an organism. __________________ Indicate whether the statement is true or false
Which of the following tissues transport water and dissolved minerals upward from the roots?
a. phloem b. xylem c. cortex d. vascular cambium e. cork cambium
Cells migrate from one place to another during gastrulation using
A) cilia. B) cellular protrusions. C) flagella.