Older roots can become extremely thick and woody as ________ accumulates during secondary growth.
A. Secondary phloem
B. Sapwood
C. Primary xylem
D. Secondary xylem
E. Primary phloem
Answer: D. Secondary xylem
You might also like to view...
A human body cell that has 46 chromosomes goes through mitosis and produces two daughter cells that each have ________ chromosomes
a. 92 b. 23 c. 2 d. 46
Experimentally offering newborn coastal and inland garter snakes banana slugs demonstrated that ________
a. only the coastal variety of garter snakes carry the for gene b. coastal garter snakes instinctively reject toxic banana slugs c. there is a genetic basis to food preference in garter snakes d. snakes eat whatever food provides the appropriate stimulus to their nervous system
A base-pair substitution may alter a protein by changing an amino acid or by introducing a(n)
_____________________. Fill in the blank(s) with the appropriate word(s).
Diagnosis of syphilis is usually made by
A) the MHA-TP test. B) culturing specimens on laboratory media. C) microscopic evaluation of stained specimens. D) DNA probes. E) a Pap smear.