Characterization of symmetry and nervous system
Describe the characterization of symmetry and nervous system in echinoderms?
Expert
Adult echinoderms, all along with cnidarians, are the animals which present radial symmetry, that is, their body structures are distributed around a center. Radial symmetry in echinoderms though is a secondary radial symmetry, as their larval phase has bilateral symmetry and the radial pattern emerges only in adult individuals (that is, there are few adult echinoderms with lateral symmetry). All other animals contain lateral symmetry with the exception of poriferans (that is, no symmetry is stated for them).
Echinoderms do not existed in cephalization and they contain a diffuse network of nerves and neurons made up of a neural ring around the mouth and of radial nerves which ramify to follow the pentaradial structure of body.
Define the term primary mediators in brief?
Explain the working of contraceptive diaphragm? Also mention the limitations of this contraceptive method?
What do you mean by type IV hypersensitivity?
How urea is formed within the human body?
The oxygen comes from the atmosphere and carbon-dioxide in the end returns to the atmosphere. How do small animals resolve the problem of taking away and bringing such molecules from/to their cells? Why that isn’t answered possible for bigger animals?
What is the nature of stimulus received and transmitted by neurons?
Colleges & universities frequently do not pay salaries that are market-driven. For instance, it is typical for a history professor to make the similar as an economics professor. What types of problems are likely to result from this type of a pay scale?
From which germ layer do the blood cells originate? Which are other organs and tissues which are made from that germ layer?
How oxy-haemoglobin and haemoglobin are different from each other? Where we can find the higher concentration of oxy-haemoglobin, within the peripheral tissues or within lungs?
Are bacteria the mere prokaryotic beings?
18,76,764
1927828 Asked
3,689
Active Tutors
1434958
Questions Answered
Start Excelling in your courses, Ask an Expert and get answers for your homework and assignments!!