Xylem tissue may contain each of these cell types, except which?
A. vessel members
B. tracheids
C. sieve cells
D. fibers
E. rays
C. sieve cells
Sieve cells are characteristic of phloem. See section 36.2 for a more detailed description of xylem and phloem.
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The gross output of ATP from glycolysis is ________, whereas the net output of ATP is ________.
A) 2; 1 B) 4; 2 C) 4; 1 D) 6; 4 E) 2; 4
Exposure to a light source
a. decreases melatonin levels. b. increase melatonin levels. c. decrease testosterone levels. d. is used to treat SAD and jet lag. e. does more than one of these
Which one of the following is a component of blood plasma?
A) collagen B) hemoglobin C) bone D) water E) mitochondria
The transpiration pull is due to the ________ that causes water to move up through the xylem that begins at the surface of mesophyll cells.
Fill in the blank(s) with the appropriate word(s).