Define the term cephalization
Define the term cephalization? How does lateral symmetry prefer cephalization?
Expert
Cephalization is an evolutionary tendency of concentration of nervous command in the central structures in which there are group of neurons (that is, brain and ganglia formation). Evolutionarily the cephalization procedure starts with the appearance of ganglia (that is, group of neurons) in platyhelminthes and reaches an apex in the vertebrates, animals with a cranial box to defend the well-developed brain.
By lateral symmetry the body can be classified into lateral portions, inferior, superior, anterior and posterior. Such portions should be integrated and controlled in certain manner and this require stimulated the appearance of ganglial complexity and of beings with a head, an advantaged extremity of the bilateral body where the nervous central command and significant sensory organs are situated.
Define the term mixed gland? Why the pancreas is considered as a mixed gland?
What do you mean by type IV hypersensitivity?
Explain the phenomenom of plasmolysis and how it can be used to determine osmotic pressure of cell sap
Are proteins with same number of each different amino acid that forms them essentially identical proteins?
What circumstances will you generally see as a diagnostic radiologist?
Techniques of Scientific Management Time Study : Time study is the technique used to measure the time that may be take
Do echinoderms contain an excretory system? How is the excretion completed in such animals? Answer: Echinoderms do not contain an excretory system. Their excretions
Give a brief explanation of the term radio immuno assay.
Describe phagocytic cells (that is, macrophages)?
How does photosensitivity in the cnidarians, annelids and worms differ from cephalopods, insects, and the vertebrates?
18,76,764
1930185 Asked
3,689
Active Tutors
1433373
Questions Answered
Start Excelling in your courses, Ask an Expert and get answers for your homework and assignments!!