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Q. What do you mean by Hemichordata ?
Hemichordates re vermiform (worm-like) animals which have few characters like those of the chordates, hence the name hemichordata (hemi : half; chorda : string or cord). Hemichordates belong to the deuterostome branch of the animal kingdom and are enterocoelous coelotnates with radial cleavage. They show some of both echinoderm and chordate characteristics. A chordate plan is suggested by gill-slits in the pharynx and a restricted dorsal tubular nerve cord in the collar region. On the other hand, similarity to echinoderns is shown in (i) larval features and (ii) in having an epidermal nerve net. In this unit you will stildy the type specimen Balarroglossus of the phylum hemicliordat and the tornaria larva which is typically found in its life cycle.
Cleavage - Metazoa The unicellular zygote begins cell division (cleavage). First, the single cell divides forming two cells, these redivide further to form four, then eight ce
Mineralisation and Humification As a result of physical weathering, the rocks are broken down into smaller particles. But this is not the true soil, and plants cannot grow well
Q. How do hormonal tests to detect pregnancy work? Laboratory tests to detect pregnancy commonly test for human chorionic gonadotropin (HCG) concentration in urine or blood sam
Compromised health or 'surviving' implants The features or clinical conditions which are representative of this group are: i) No pain in the implant site upon function ii
Renal Glycosuria Renal glycosuria is a condition in which the glucose is excreted in the urine in spite of normal blood sugar levels. Self Monitoring of Blood Glucose (SMBG
How to monitor body weight to enhance athletic performance? Monitoring body weight is a practical way to assess energy balance. Weight stability, particularly during periods
Adaptations to high wind velocity The mechanical force of the wind and the grinding action of sand, dust, snow and other materials driven by it cause the plants to adapt themse
what is the biological significance of skeleton
Antibodies of dissimilar specificities, which react to the same antigen, are known as polyclonal antibodies.
EYE HISTOR Y - Steva n described it first. Study of eye is ophthalmology. Instrument used to examine interior of eye is ophthalmoscop e . SHAP E - More o
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