Main features of phloem
What are the cell types that form the phloem? What are the main features of those cells?
Expert
The main cells that form the phloem are the sieve elements and the companion cells. The sieve elements form the vessel walls; they are living enucleated cells positioned in series forming the sieve tubes. Between successive vessels elements there are communicating pores. The companion cells are located outside and alongside the sieve tubes and they help in the absorption of the material to be transported.
Whether extra-embryonic membranes are same in all the vertebrates?
Explain the water cycle? Describe in detail.
What do you understand by the terms bacterial transformation and transduction?
Give a brief description of neurotransmitter of neuromuscular junction? How does nervous system trigger the muscle contraction?
Data-mining systems and Artificial intelligence are often used as "training data sets" and "test data sets." Define such terms and explain briefly how such data sets are utilized.
What is the name of the larva of corals and sea anemones? What is the biological importance of that larval stage?
Specify the hormones which are produced by testicles and ovaries?
Describe vision? Why is vision significant for life on earth?
The Cows swallow their food once and then this food goes back to the mouth to be chewed once more. How this phenomenon be explained?
Characteristics of the objectives Important characteristics or features of the objectives are as below: 1. &nbs
18,76,764
1927711 Asked
3,689
Active Tutors
1440490
Questions Answered
Start Excelling in your courses, Ask an Expert and get answers for your homework and assignments!!