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What are the reasons that you could think of for the arthropods to constitute the largest group of animal kingdom?
Arthropods constitute the longest group of animal kingdom due to following reasons (i) Arthropods have a chitinous exoskeleton. that give protection. (ii) A single ootheca contains a huge number developing eggs inside.
Arthropods constitute the longest group of animal
See lesskingdom due to following reasons
(i) Arthropods have a chitinous exoskeleton. that give
protection.
(ii) A single ootheca contains a huge number
developing eggs inside.
What are the peculiar features that you find In parasitic helminthes?
Parasitic platyhelminthes have a thick cuticle. They lack alimentary canal and absorb the nutrients directly through their body surface. Some parasites are provided With hooks and suckers.
Parasitic platyhelminthes have a thick cuticle. They lack
See lessalimentary canal and absorb the nutrients directly
through their body surface. Some parasites are provided
With hooks and suckers.
How is mesoglea different in ctenophores than in cnidarians?
The mesoglea in ctenophores also contains amoebocytes, elastic fibres and muscle cells
The mesoglea in ctenophores also contains
See lessamoebocytes, elastic fibres and muscle cells
Why is Coelenterata called Cnidaria?
Coelenterata is called Cnidaria because of the presence of stinging cells called cnidoblasts or nematoblasts
Coelenterata is called Cnidaria because of the presence
See lessof stinging cells called cnidoblasts or nematoblasts
Skeleton is absent in annelids. How is it's body shape maintained?
Skeleton in annelids is absent. Coelomic fluid acts as hydrostatic skeleton which maintains its body shape.
Skeleton in annelids is absent. Coelomic fluid acts as
See lesshydrostatic skeleton which maintains its body shape.
Name the Aschelminthes in which rhabditiform larva is present.
Ascaris and Enterobius (pinworm).
Ascaris and Enterobius (pinworm).
See lessClassify phylum—Cnidaria in different classes.
Cnidaria is divided into following three classes (i) Hydrozoa (iii) Anthozoa (ii) Scyphozoa
Cnidaria is divided into following three classes
See less(i) Hydrozoa
(iii) Anthozoa
(ii) Scyphozoa
Name a mollusca In which respiration occurs through mantle cavity.
In Limax (slug) and Helix (land snail).
In Limax (slug) and Helix (land snail).
See lessIn which group pseudosegmentation occurs? What is it?
It is found in Platyhelminthes. Pseudosegmentation is the formation of new segments through budding or strobilation.
It is found in Platyhelminthes. Pseudosegmentation is
See lessthe formation of new segments through budding or
strobilation.
Which coral is used to make precious jewellery?
Corallium nobile (red coral).
Corallium nobile (red coral).
See less