This is literally like my 5th time posting this up. If you can't answer it, just tell me so that it saves me my own time. Thank you
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
MC -- you're certainly familiar enough with the Jiskha Forum and many of its tutors to know that your questions would have been answered if we could help you.
The obvious conclusion is that we do not know what answers your teacher is seeking.
That's all I needed to know. I thought my post was just being ignored, or not seen.
Thanks
-MC
To answer your questions:
19. To determine the correct answer, we need to understand where the secondary xylem and phloem originate. The secondary xylem and phloem are formed from the vascular cambium. The vascular cambium is a type of meristem tissue that gives rise to secondary growth in plants. It produces new cells that differentiate into secondary xylem towards the inside and secondary phloem towards the outside. So, the correct answer here is b. vascular cambium.
7. The question asks for a difference between beans and corn during germination. To answer this, we need to examine the characteristics of both plants during germination. In beans, the cotyledons (embryonic leaves) are usually above ground, and they are responsible for providing nutrients to the young seedling. In corn, the corn shoot is hooked or bent sharply near the base, which helps protect it from damage as it emerges from the soil. Therefore, the correct answer is a. The cotyledons are above ground in the bean plant.
8. This question is about the role of cork cambium in a woody stem. The cork cambium is a type of lateral meristem that produces the cells of the outer bark in woody stems. It is responsible for the formation of cork cells, which are dead cells that provide protection to the underlying tissues. So, the correct answer here is c. It produces the cells of the outer bark.
Based on your explanations, the correct answers to the multiple-choice questions 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
I hope this helps! Let me know if you have any further questions.