Which phylum has a coelom and triploblastic animal?
The body of annelids is segmented. Annelids are triploblastic (three germ layers present) and possess a true coelom. The coelom is the fluid-filled body cavity present between the gut wall and body wall. Some of the examples of annelids are earthworms, leeches, etc.
Fig: Phylum Aneelida
When the coelomic fluid serves as a skeleton it is known as
Coelomic fluids serves as a skeleton in some insects called as hydrostatic skeleton that help in maintaining shape and size of the body of organisms in absence of bone or cartilage
The limbless amphibian is:
Ichthyophis is a species of caecilians; the limbless amphibians usually observed in Southeast Asia, the western Indo-Australian Archipelago, and the southern Philippines.
At first look, this animal seems to be an earthworm. This is the class that has an aquatic larval degree and a mundane grown-up phase.
What is the main excretory organ in insects?
The insects belong to phylum Arthropoda and hence, the excretory organ is Malphighian tubules.
Fig: Malphighian tubules
In some animal groups, the body is found divided into compartments with serial repetition of at least some organs. This characteristic feature is called:
Metamerism: In some animals, the body is externally and internally divided into segments with a serial repetition of at least some organs.
For example, in earthworm, the body shows this pattern called metameric segmentation and the phenomenon is known as metamerism or true segmentation. Metamerism is found in 3 animal phylums - Annelida, Arthropoda and Chordata.
Fig: Metamerism in Earthworm
Choose the odd one out based on coelom:
Animals possessing coelom are called coelomates, e.g.,annelids, molluscs, arthropods, echinoderms, hemichordates and chordates.
These are the animals in which there is no cavity present. The most common example is Platyhelminthes known as acoelomates.
Which one of the following group of animals is correctly matched with its characteristics without any exception?
The members of class-Chondrichthyes are marine animals with streamlined body and have cartilaginous endoskeleton.
Air bladder is absent in
Air bladder provides buoyancy to the aquatic animals thus helps them to stay at the current water depth without having to waste energy in swimming. It is found in many bony fishes but not in cartilaginous fishes. Shark being a cartilaginous fish, does not possess air bladder.
So, the correct answer is option B.
Which among the following is a gregarious pest?
Locust (Locusta) is a gregarious pest belonging to phylum Arthropoda.
Fig: Image of Locust
The larvae of urochordates is called:
The larvae of urochordates are called tadpole larvae. This larva is free-swimming and exhibits all chordate characteristics. It has a notochord, a dorsal nerve cord, pharyngeal slits and a post-anal tail.
In coelenterates, the cell shows:
In coelenterates, the arrangement of cells is more complex. Here, the cells performing the same function are arranged into tissues, hence is called tissue level of organisation.
Animals which possess cleidoic egg exhibit:
The phylum in which adults exhibit radial symmetry and larva exhibit bilateral symmetry is:
Symmetry is an attribute of an organism showing regularity in body parts on a plane or around an axis. In Phylum Echinodermata, the adult echinoderms are radially symmetrical but the larvae are bilaterally symmetrical.
Identify the animal given below. Mention its phylum.
The animal is identified as Euspongia which belongs to phylum Porifera.
The scientific name of Asian tiger mosquito
The Asian tiger mosquito (Aedes albopictus) is a small black and white mosquito, about 1/4-inch long.
The cross-section of the body of an invertebrate is given below. Identify the animal which has this body plan.
This picture is Pseudoceolomate because patches of mesoderm is lined, and Pseudoceolomate animal are aschehelmenthis so, the answer is roundworm.
Which of these is a fresh water sponge?
The zoological name of fresh water sponge is Spongilla.
Fig: Image of Spongilla
Which group of chordates possesses sucking and circular mouth without jaws?
Class-Cyclostomata is comprised of the living jawless fishes. Their mouth is circular and lack jaws, hence they are also called agnathans. It is surrounded by tentacles (e.g., lampreys and hellish). These also also possess retractable teeth.
Fig: Class of Cyclostomata
The excretory organ of Saccoglossus is:
Saccoglossus belong to phylum Hemichordata and hence the excretory organ is proboscis gland.
Species going to extinct due to low reproductive rate is
Giant panda is going to extinct due to low reproductive rate. They live in mountain ranges in central china. Their reproduction rate is vary less due to climatic conditions.
Given below are types of cells present in some animals. Which of the following cells can differentiate to perform different functions?
Which one of the following is a living fossil?
Limulus polyphemus or Atlantic horseshoe crab are considered 'living fossils' as they haven't undergone obvious morphological changes in comparison with Carboniferous and Triassic fossil forms. Moreover, they are the only ones that survived different extinction events.
Which among the following is oviparous?
Platypus is oviparous as it is an egg-laying mammal. Rest three are viviparous mammals.
A reptile having four chambered heart is
Reptiles generally possess three chamber heart, two upper chamber and single lower chamber. But in crocodile, the heart is four chambered having two atrium and two ventricles.
Which one of the following statements is incorrect?