Which cells in the root have a suberin layer called the Casparian strip?
A. endodermis
B. pericycle
C. cortex
D. epidermis
E. root hair
A. endodermis
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Water enters the water vascular system of a sea star through a structure called the ____
a. ampulla b. ossicle c. radial canal d. ring canal e. madreporite
Which of the following types of ecosystems would have the lowest percentage of total net primary
productivity?
a. open ocean b. savanna c. swamp and march d. temperate deciduous forests e. tundra
In the following reaction, what type of bond is holding the two atoms together? K+Cl ? K+ + Cl? ? KCl
A) hydrophilic B) ionic C) hydrophobic D) covalent
Which of the following statements is true about epigenetic regulation?
A) Epigenetic regulation changes the sequence of DNA nucleotides. B) Epigenetic regulation is unable to affect a cell's phenotype. C) Epigenetic regulation is completely understood. D) Epigenetic regulation is a way to control protein synthesis. E) DNA methylation is one example of epigenetic regulation that is only found in prokaryotes.