7. What are the beneficial elements? 8. Diagnosis of nutritional disorder by vis

Question

7. What are the beneficial elements? 8. Diagnosis of nutritional disorder by visible symptoms needs to consider the following A Symptoms D. The patterns of Chlorosis and necrosis E. All of the above..E A, B&C; B. Specificity C. Mobile and immobile elements 9. What mineral deficiency could cause an abnormal development of vascular system, especially xylem? A. Boron D. Sodium a) plants carry water upward. b) plants carry nutrients upward. c) plants carry nutrients downward d) a tree is killed by interrupting the passage of phloem sap. e) a tree is killed by interrupting the passage of xylem sap. 11. Symplast is that are. connected.by plasmodesmata throughout the plant body B. the free space of the tissue, include cell walls and intercellular spaes C All the tissues in plant including protoplasts and cell walls 12. What organisms are autotroph? A. Organism that makes its own organic compounds using an environmental energy source. B. Organism that can't makes its own organic compounds, feed by others C. Both A and B D. Neither 13. What pathway(s) via which that ion could be taken by plant roots? A. Apoplast C. Symplast Apoplast conbined pathway B. Symplast D. Either of above E. A or B

Explanation / Answer

Q7) benefical elements:- are those elements which promotes growth and development to the plants. Examples are sodium, selenium, and silicon, cobalt , these are considered beneficial elements.

Q9) What mineral deficiency could cause an abnormal development of vascular system especially xylem is:- A) Boron

Q10) Girdling is a process by which:- D) A tree is killed by interrupting the pessage of phloem sap.

Q12) What organism are autotroph:- A) Organism that makes its own organic compounds using an environmental source.

Q13) What pathways via which that ion could be taken by plant roots:- D) either of the above

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