Can you guys please just help me out?
19. The secondary xylem and phloem form from
a. cork cambium
b. vascular cambium
c. apical meristems
d. bark
B?
7. A difference between beans and corn during germination is
a. the cotyledons are above ground in the bean plant
b. the corn shoot is hooked to protect it from damage
c. the bean plant cannot germinate until water penetrates the seed coat
d. oxygen is required in the seed before a corn plant can germinate
A?
8. In a woody stem, cork cambium
a. forms phloem by producing sieve tubes
b. forms xylem by producing vessel cells
c. produces the cells of the outer bark
d. becomes vascular cambium
C?
-MC
To find the answers to these questions, we can analyze the given options and determine the correct answer based on our knowledge of plant anatomy and germination processes. Let's go through each question:
19. The secondary xylem and phloem form from:
a. cork cambium
b. vascular cambium
c. apical meristems
d. bark
In this question, we are asked about the origin of secondary xylem and phloem. The secondary xylem and phloem are formed from the vascular cambium, which is a type of meristematic tissue responsible for lateral growth in plants. Therefore, option B, "vascular cambium," is correct.
7. A difference between beans and corn during germination is:
a. the cotyledons are above ground in the bean plant
b. the corn shoot is hooked to protect it from damage
c. the bean plant cannot germinate until water penetrates the seed coat
d. oxygen is required in the seed before a corn plant can germinate
This question asks for a difference between beans and corn during germination. Among the given options, one difference is that in the bean plant, the cotyledons (seed leaves) are above ground during germination, while in the corn plant, the corn shoot is hooked to protect it from damage. Therefore, option A, "the cotyledons are above ground in the bean plant," is correct.
8. In a woody stem, cork cambium:
a. forms phloem by producing sieve tubes
b. forms xylem by producing vessel cells
c. produces the cells of the outer bark
d. becomes vascular cambium
This question asks about the role of cork cambium in a woody stem. The cork cambium is responsible for producing the cells of the outer bark. Option C, "produces the cells of the outer bark," is the correct answer.
Therefore, the correct answers are:
19. b. vascular cambium
7. a. the cotyledons are above ground in the bean plant
8. c. produces the cells of the outer bark