Which structure in the leaf controls the opening and closing of the stroma?
a) spongy mesophyll
b) guard cells
c) epidermis
d) cuticle
Answer: b) guard cells
You might also like to view...
In which of the following cases will a Barr body be seen?
A) only XX B) XY C) XO D) only XXY E) both XX and XXY
Darwin was very interested in the observation that animals on distant and isolated landmasses appeared to be related to animals on the mainlands. However, despite their similar appearance, the animals were indeed not related. Which of the following types of evidence would help Darwin make sense of his observations?
A. biogeographical B. fossil C. anatomical D. biochemical
If your goal was to become an endurance athlete, what type of training should you select, and why, to increase performance?
What will be an ideal response?
How many letters are in the RNA "alphabet" of the genetic code?
a. 4 b. 5 c. 20 d. 64