Exercise 4 (Histology) 1. 1 Give at least three distinguishing features of these groups of cells. Apical meristems have the following features: (1) a “border” of cells; (2) they follow order or shape; and (3) some cells are darker (indicating that they undergo mitosis). 2. 1 Identify the tissue. The tissue is a vascular cambium. 4. 5 (? ) Is the epidermis uniseriate or multiseriate? In the cross section of a young root of Helianthus, the epidermis is uniseriate. 6. 1 What do you call the outgrowths of the epidermis? These are called trichomes. 6. 2 What is their function?
They function mainly for support and protection of the leaf or stem which contains the epidermis. 6. 3 Classify the types of epidermal outgrowths in the above plants. bristle| scale| simple hair| glandular| branching| stellate| 7. 1 Draw and identify the tracheary elements. reticulate| annular| pitted| scalariform| helical| 8. 1 Differentiate the sieve tubes from the companion cells. The sieve tubes in the phloem are composed of long, narrow cells which lack a nucleus, ribosomes, and some other cellular components; they transport sugars and other organic nutrients.
Companion cells have nuclei and ribosomes that also serve the sieve-tube cells but do not themselves take part in conduction. 8. 2 What are the principal water-conducting elements of the xylem? The two principal water-conducting elements of the xylem are the tracheids and the vessel elements. 9. (Table 4. 1) Specimen| Tissue| Cell Types| Characteristic(s)| Function(s)| Cassava pith| | | | | Tomato fruit pulp| | | | | Spanish flag petiole| | | | | Lotus peduncle| | | | | Celery petiole| | | | | Coleus petiole| | | | | Mung bean seed coat| | | | | Peanut pericarp| | | | | Pineapple leaf| | | | | Others| | | | |
Delivering a high-quality product at a reasonable price is not enough anymore.
That’s why we have developed 5 beneficial guarantees that will make your experience with our service enjoyable, easy, and safe.
You have to be 100% sure of the quality of your product to give a money-back guarantee. This describes us perfectly. Make sure that this guarantee is totally transparent.Read more
Each paper is composed from scratch, according to your instructions. It is then checked by our plagiarism-detection software. There is no gap where plagiarism could squeeze in.Read more
Thanks to our free revisions, there is no way for you to be unsatisfied. We will work on your paper until you are completely happy with the result.Read more
Your email is safe, as we store it according to international data protection rules. Your bank details are secure, as we use only reliable payment systems.Read more
By sending us your money, you buy the service we provide. Check out our terms and conditions if you prefer business talks to be laid out in official language.Read more