Home
Class 12
BIOLOGY
Read the statements regerding echinoderm...

Read the statements regerding echinoderms and choose th correct option (i) All are marine with organ system level of organisation (ii) Adults are bilaterally symmetrical (iii) They are dioecious (iv) Fertilization is internal an indirect development is observed (v)Triploblastic and acoelomate animals

A

(i) and (iii) are correct

B

(v) alone is correct

C

(i), (iii) and (v) are correct

D

(i) and (v) are correct

Text Solution

Verified by Experts

The correct Answer is:
A
Promotional Banner

Similar Questions

Explore conceptually related problems

Consider following features: (a) Organ system level of organisation (b) Bilateral symmetry (c) True coelomates with segmentabon of body Select the correct option of animal groups which possess all the above characteristics.

Read the following statements and choose the correct option (i) Aves are homothermous (ii) Pinnae are present in mammals (iii) Operculum is present in chondrichthyes (iv) Skin of amphibians is dry and horny . (v) Open type of circulation is found in cyclostomes

Read the following statements and select the incorrect ones. (i) Circulatory system in arthorpods is of closed type. (ii) Parapodia in annelids help in swimming. (iii) Phylum Mollusca is the second largest animal phylum. (iv) Aschelminthes are dioecious.

Read the following statements and choose the correct option (i) Glomerular filtration rate in a healthy individual is about 180 ml/day (ii) All constituents of plasma pass into lumen of Bowman's capsule (iii) 70 - 80% of electrolystes and water are absorbed in PCT (iv) Angiotensin II increases the glomerular blood pressure and GFR (v) Counter current system contribute in concentrating the filtrate

Read the following statements and select the correct option (i) Blood cells secrete fibres of structural proteins called collagen and elastin (ii) Neuroglial cells protect and support the nephrons (iii) Osteocytes are present in spaces called lacunae (iv) Striated muscle fibres are bundled together in a parallel fashion (v) Biceps are involuntary and striated.

Which of the following statements are incorrec? (i) Parapodia are lateral appendages in arthropods used for swimming. (ii) Radula in molluscs are structures involved in excretion. (iii) Aschelminthes are dioecious. (iv) Echinoderm adults show radial symmetry. (v) Ctenophorans are diploblastic

Read the following statements regarding muscle contraction (i) One ATP utillised for making and breaking of the cross bridge. (ii) The sarcomere lies between 2 Z-lines (iii) Tropomysin blocks the active sites in resting stage (iv) Ca^(++) ions help in unmasking active sites on actin Choose the correct option

Given below are a few statements related to external fertilisation. Choose the correct statements. (i) The male and female gametes are formed and released simultaneously. (ii) Only a few gametes are released into the medium. (iii) Water is the medium in a majority of organisms exhibiting external fertilization. (iv) Offspring formed as a result of external fertilisation have better chance of survival than those formed inside an organism.

Read the following statements and choose the correct answer. (i) Gap junctions cement adjacent cells together. (ii) Areolar tissue contains fibroblasts , macrophages and mast cells. (iii) Tight junctions facilitate the cells to communicate with each other (iv) Adhering junctions help to stop substances from leaking across tissues (v) Cells of connective tissue except blood secrete fibres of structural proteins called elastin.

Read the following statements (i) the point of bifurcation of trachea is called carina and is at the level of 5th thoracic vertebra (ii)the right bronchus is shorter wider and more in line with trachea than the let bronchus (iii) the bronchioles are without cartilaginous rings (iv) the surfactant of lungs is secreted in infants between 6th and 7th month of life which of these are correct ?