Plants control the diffusion of water vapor and gases across the epidermis by means of ____.
A. xylem
B. phloem
C. periderm
D. companion cells
E. stomata
Answer: E
You might also like to view...
How many times must each of the reactions in the Calvin cycle take place in order to
A. 6 B. 3 C. 2 D. 1
This is formed when an atom loses an electron to another atom.
A. polar covalent bond B. cations and anions that can form ionic bonds C. covalent bond D. hydrogen bond E. nonpolar covalent bond
Chrysolaminarin is a storage product found in which group of microbes?
a. dino?agellates b. euglenids c. golden algae d. brown algae
While hiking, you must push aside thick branches that are near your face. One of them rips the skin on your arm and you begin to bleed from the cut. Which of the following plays an important role in initially protecting you from infection?
A) nonspecific antibodies B) barriers such as dead skin cells and mucus because they are part of the innate immune system C) increased production of certain hormones and changes in microcirculation D) memory cells because they are part of the adaptive immune system