what are the locomotory organs in the following animal earthworm cockroach Bony fish and pigeon
Answers
Explanation:
To observe and draw the given specimens – earthworm, cockroach, bony fish and bird. For each specimen record.
One specific feature of its phylum.
One adaptive feature with reference to its habitat.
MATERIALS REQUIRED
Preserved specimens of earthworm, cockroach, bony fish and bird, pencil, practical notebook.
THEORY
Different organisms live in different habitats. Each animal has certain features which enable it to live in its habitat. The special features which enable plants and animals to be successful in a particular environment are called adaptations. Adaptations are due to certain modifications that are observed in organism at morphological, anatomical and physiological levels. By observing simple morphological features different adaptations found in organisms can be studied.
PROCEDURE
Observe carefully the preserved specimen.
Note the characteristics of organisms.
Draw well labelled diagrams in practical notebook.
OBSERVATIONS
1. EARTHWORM (Pheretima)
It belongs to phylum Annelida.
FEATURES OF PHYLUM
The body of the animal is divided into segments (internally and externally) called metameres.
Chitinous setae which act as locomotory organ are present.
Adaptive Features
Earthworm lives inside a burrow in the soil. It has following adaptations:
Its body is cylindrical and elongated.
The anterior end is pointed and bears mouth. Over the mouth is a small sensory lobe called prostomium. It helps in sensing the soil while digging.
It feeds on soil or humus and excretes fine soil and undigested material as ring-shaped castings through anus. This helps in making burrows.
Skin is always kept moist with the help of mucus glands.
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2. COCKROACH (Periplaneta)
It belongs to phylum Arthropoda.
FEATURES OF PHYLUM
The body is divided into segments with a distinct head.
It possesses jointed appendages with three pairs of legs.
ADAPTIVE FEATURES
Cockroaches live in warm, dark and wet places. They are found in sewers, basements, in drains etc. They are adapted to nocturnal habit. Following are adaptations found in cockroaches.
The body is covered by chitinous cuticle which is impervious to water.
On the lateral side of body spiracles are present which help in respiration.
Head is triangular in shape and bears two compound eyes and two antennae. Antennae are sensory in function.
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3. Bony fish
It belongs to phylum Chordata, sub phylum Vertebrata and class Pisces.
Features of Phylum chordata
They have notochord.
They have post anal tail.
Features of Class pisces
They are aquatic animals.
They have four pairs of gills which are covered by operculum.
They have terminal mouth.
Adaptive Features
Bony fish adaptive to live in water (aquatic adaptations).
They have streamlined body which helps in swimming.
Their body is covered by scales.
They have dorsal, pelvic, pectoral and tail fins for locomotion. Dorsal and pelvic fins help in balancing and movement in water, pectoral fins act as brakes and tail fins help in changing direction.
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Answer:
The answer of this question goes like this :
Explanation:
1. Earthworm - Contraction and relaxation of muscles.
2. Cockroach - Legs and wings
3. Bony Fish - Fins
4. Pigeon - Wings and legs
HOPE THIS HELPS!