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Bilateral - Metazoa
Bilaterally symmetrical animals have the major axis running from head (anterior) to tail (posterior). They have a ventral (lower) and dorsal (upper) surface that are different from each other. They have only two sides that look alike, the right and left. The animal can be divided into just two identical halves through a plane which passes from anterior to posterior end. Almost all animals including human beings except for sponges, ctenophores and cnidarians show bilateral symmetry.
Adult echinoderms, though radially symmetrical (pentamerous) have larvae that are bilateral. This is because they have evolved from bilaterally symmetrical ancestors. In general, bilateral animals that adopt a sessile existence commonly exhibit a shift towards radial symmetry. The shift may be slight as in acorn barnacles where only protective circular wall plates are arranged radially or the shift may be profound as in the case of sea stars or starfishes. Bilateral animals are called Bilateria.
Starch exists in plants as insoluble starch granules in chloroplasts. Each starch granule holds a combination of two polysaccharide forms, amylopectin and amylose.
What is an etiological agent of disease? An etiological agent of disease is the agent that causes the disease. It might be a living being, substance or environmental fact.
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Competence of Larval Tissue or Multiple Responses The responsiveness of different larval tissues to thyroxine is markedly different. The tissues of the tail becomes necrotic
examples of gametes
Following statement true for prokaryotic or eukaryotic? They use deoxyribonucleic acid as their major information storage molecule
State the Stabilization of haem pigments Ligands suggested for the stabilization of haem pigments are imidazole (and its derivatives), S-nitrosocysteine and nitrite. Whereas se
what is the classification of poisonous arthropods according to their mode of toxicity to human
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