Star fish and sea urchin
To what order does each of the echinoderm species Star fish and sea urchin belong? Describe why they are classified under that order.
Expert
Star fish and sea urchin belong to order – Forcipulatida. Because they have radial symmetry, several arms radiating from a central body). The body actually consists of five equal segments, each containing a duplicate set of various internal organs. They have no heart, brain, nor eyes, but some brittle stars seem to have light sensitive parts on their arms. Their mouth is situated on the underside and their anus on top.
Define the term allergens?
Describe the protective structures of the central nervous system existed in vertebrates?
Distinguish between spermatids and sperm cells? Also explain about transformation of spermatids into sperm cells?
Lipid rafts provide another example of the complexity of cell surfaces in both their structural character and biologic functionality. Please explain the nature of these structures and their functionality.
Why do mitochondria of sperm cells concentrate within the base of the flagellum?
Give a brief explanation of autotrophic beings. And also give a brief explanation of heterotrophic beings?
What is the nature of stimulus received and transmitted by neurons?
What are the conditions when Ionization takes place?
Write down the formula of DPD for withered (shrunken) plant cells? How that circumstances is probable?
Define the term co-ordination covalent bond in short.
18,76,764
1943231 Asked
3,689
Active Tutors
1423915
Questions Answered
Start Excelling in your courses, Ask an Expert and get answers for your homework and assignments!!