Write down the cell types which form xylem
Write down the cell types which form xylem? And also write down the main aspects of those cells?
Expert
The main cells of xylem are tracheids and vessel elements (these only in the angiosperms). The tracheids and vessel elements are dead cells which have lost their cytoplasm and only their cell wall impregnated with the lignin (an impermeable biopolymer) remained. The tracheids form tubes which communicate with neighboring tubes by the pores; the vessel elements don’t present pores however instead they communicate with successive vessel element by the perforations in their extremities.
Where in eukaryotic cells does mRNA synthesis take place? To where do such molecules transfer?
Are flatworms dioecious or monoecious? Briefly illustrate.
Explain whether the transpiration is the only way through which leaves lose water?
After passing epididymides by which structures do sperm cells go till exteriorization?
Why does the geographical isolation lead to the speciation?
Explain the term immunogen?
This factor refers to personal traits such as dominance, aggressiveness, persistence and other qualities reflected through a person's behavior. An individual's personality determines the type of activities that he or she is suited for, and the likelihood that the pers
Is embryonic growth in birds direct or indirect? Answer: The embryonic growth is direct, there is no larval phase.
How do auxins act assisting the lateral (secondary) growth of stem?
What are the sub-products of the photochemical phase which are necessary for the chemical phase of photosynthesis?
18,76,764
1932561 Asked
3,689
Active Tutors
1451287
Questions Answered
Start Excelling in your courses, Ask an Expert and get answers for your homework and assignments!!