Some plants are able to endure frequent flooding events because they contain a tissue with loose parenchyma cells and large air spaces called
A. xylem.
B. spongy mesophyll.
C. pneumatophores.
D. aerenchyma.
E. epidermal tissue.
D. aerenchyma.
Aerenchyma is a tissue composed of loose parenchyma cells intermixed with large air spaces. The tissue functions in transporting oxygen to the parts of the plant that are submerged.
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Based on your knowledge of hydrocarbon degradation, what factors most likely limited the rate of petroleum degradation after the Exxon Valdez oil spill off the coast of Alaska?
A) salt concentration B) temperature C) inorganic nutrient concentrations D) temperature and inorganic nutrient concentrations
How do prokaryotes alter their genetic makeup through conjugation?
a. by moving DNA with a pilus b. by incorporating surrounding DNA into the genome c. by moving DNA with a bacteriophage d. by using microbial metabolism to accept new DNA
In some species, the sex of the future individual is determined by environmental conditions and not by sex chromosomes. Which species determines its sex by temperature?
a. birds b. fruit flies c. frogs d. rabbits e. zebras
can facilitated diffusion occur in any direction?
What will be an ideal response?