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Question 1:
Which statement about Ascaris is incorrect?
Topic: Characteristics of Ascaris
Correct Answer: C) Females are smaller than males.
Detailed Hints:
- Ascaris is a type of parasitic roundworm with sexual dimorphism, where males are typically smaller than females.
- Ascaris worms are characterized by a reddish color and the presence of penial setae in males.
- Therefore, the incorrect statement about Ascaris is C, "Females are smaller than males".
Question 2:
Which element causes the blue color of hemocyanin in the octopus and cuttlefish?
Topic: Hemocyanin in Marine Life
Correct Answer: D) Copper
Detailed Hints:
- Hemocyanin is a copper-containing protein that gives the blood of some marine animals, like the octopus and cuttlefish, a blue color.
- Copper is responsible for the blue color, contradicting options A, B, and C.
- Hemocyanin can carry up to three times more oxygen than hemoglobin, which is essential for these marine organisms.
Question 3:
How many pairs of pseudo hearts are present in an earthworm?
Topic: Anatomy of Earthworms
Correct Answer: D) 4-5 pairs
Detailed Hints:
- In earthworms, pseudo hearts, also known as aortic arches, are prominent structures.
- There are 4-5 pairs of pseudo hearts that rhythmically contract to ensure continuous blood circulation within the earthworm's body.
- This contradicts options A, B, and C.
Question 4:
Where does Ascaris lumbricoides normally reside in humans?
Topic: Parasitic Organisms
Correct Answer: C) Intestine
Detailed Hints:
- Ascaris lumbricoides is a species of parasitic roundworm that typically inhabits the small intestine in humans.
- It lives freely within the lumen or cavity of the small intestine, contributing to its cylindrical structure.
- This refutes options A, B, and D.
Question 5:
Which of the following statements is not true for the Cephalochordata?
Topic: Characteristics of Cephalochordata
Correct Answer: D) All of the above statements are true.
Detailed Hints:
- Members of the subphylum Cephalochordata, such as Branchiostoma, retain their notochord throughout their lives.
- They are commonly referred to as Sea Lancelets.
- Given that all individual statements (A, B, and C) are true, the assertion that one of them is false (option D) is incorrect.
Question 6:
In Annelids, where is the red-colored Haemoglobin found?
Topic: Annelid Physiology
Correct Answer: C) Plasma
Detailed Hints:
- The blood of annelids exhibits a red color due to the presence of haemoglobin.
- Haemoglobin in annelids is dissolved directly in the plasma, unlike in mammals.
- This unique feature allows annelids to carry oxygen more efficiently in some environments.
Question 7:
What is the scientific name of the earthworm?
Topic: Taxonomy and Nomenclature
Correct Answer: B) Pheretima Posthuma
Detailed Hints:
- The scientific name of the earthworm is Pheretima Posthuma.
- Scientific names follow the binomial nomenclature system, which includes the genus name (Pheretima) and specific epithet (Posthuma).
MCQ 8:
What type of cleavage is observed in Hemichordata?
Topic: Developmental Biology of Hemichordata
Correct Answer: C) Holoblastic and radial
Detailed Hint:
- Hemichordates exhibit a specific type of embryonic cell division or cleavage.
- This cleavage is both holoblastic, meaning the entire egg is divided into smaller cells, and radial, indicating that the cleavage planes are either parallel or perpendicular to the animal-vegetal axis.
- Thus, the correct answer is C, "Holoblastic and radial".
MCQ 9:
What is the structure of the heart in Molluscs?
Topic: Anatomical Features of Molluscs
Correct Answer: C) One or two auricles and one ventricle
Detailed Hint:
- Molluscs have a distinct heart structure.
- Their vascular system consists of a heart with one or two auricles (upper chambers receiving blood) and a single ventricle (lower chamber pumping blood out).
- Consequently, the correct answer is C, "One or two auricles and one ventricle".
MCQ 10:
Which of the following is a typical characteristic of Echinodermata?
Topic: Unique Features of Echinodermata
Correct Answer: C) Ambulacral system
Detailed Hint:
- Echinodermata possess a unique feature known as the ambulacral or water-vascular system.
- This system is used by echinoderms for locomotion, food and waste transportation, and respiration.
- Consequently, the correct answer is C, "Ambulacral system".
MCQ 11:
What substance do Malpighian tubules convert nitrogenous waste into?
Topic: Excretory Processes in Invertebrates
Correct Answer: C) Uric acid
Detailed Hint:
- Malpighian tubules play a crucial role in excretion and osmoregulation among certain invertebrates.
- These tubules convert nitrogenous wastes into uric acid, which can be excreted with minimal water loss.
- Therefore, the correct answer is C, "Uric acid".
MCQ 12:
What is the name of the larval stage in phylum Mollusca?
Topic: Life Cycle Stages in Molluscs
Correct Answer: A) Glochidium
Detailed Hint:
- In the phylum Mollusca, the distinctive larval stage is named the Glochidium larva.
- Thus, the correct answer is A, "Glochidium".
MCQ 13:
What group of animals possess Placoid scales?
Topic: Dermatological Features of Aquatic Vertebrates
Correct Answer: A) Chondrichthyes
Detailed Hint:
- Placoid scales are unique structures found in a specific group of animals.
- They are primarily found in cartilaginous fishes of the class Chondrichthyes, which includes sharks, rays, and skates.
- Hence, the correct answer is A, "Chondrichthyes".
MCQ 14:
What is the scientific name for Cuttlefish?
Topic: Taxonomy of Marine Species
Correct Answer: C) Sepia officinalis
Detailed Hint:
- Each species in the animal kingdom has a unique Latin (or Greek) name for scientific identification.
- The Cuttlefish, a marine animal known for its ability to change skin color, is scientifically classified as Sepia officinalis.
- Therefore, the correct answer is C, "Sepia officinalis".
Question 15:
How is the body of organisms in the phylum Annelida segmented?
Topic: Anatomical Traits of Annelids
Correct Answer: C) Metamerically segmented
Detailed Hints:
- Annelids, a phylum of segmented worms, show a specific type of body segmentation.
- Their bodies are metamerically segmented, meaning that the organs are repeated in each segment.
- Thus, the correct answer is C, "Metamerically segmented".
Question 16:
Which of the following terms does not have Latin origins?
Topic: Linguistic Origins of Biological Nomenclature
Correct Answer: A) Echinodermata
Detailed Hints:
- Biological terms often have roots in Latin or Greek.
- The term "Echinodermata" is derived from Greek words, not Latin: "echinos" meaning "spine" and "derma" meaning "skin".
- Hence, the correct answer is A, "Echinodermata".
Question 17:
In which of the following organisms are setae absent?
Topic: Anatomical Characteristics of Annelids
Correct Answer: B) Leech
Detailed Hints:
- Setae, or chetae, are bristly structures found in many organisms.
- Among the given organisms, Earthworm and Lumbricus possess setae, while Dero has discreet parapodia.
- Leech, however, has two hooks instead of setae.
- Therefore, the correct answer is B, "Leech".
Question 18:
To which group do the flying mammals, bats, belong?
Topic: Mammalian Classification
Correct Answer: B) Chiroptera
Detailed Hints:
- Bats are mammals with the ability to fly, distinguishing them from other mammalian groups found in options A, C, and D.
- They belong to the order Chiroptera, which is unique for having flying mammals.
- Therefore, the correct answer is B, "Chiroptera".
Question 19:
What are the primary excretory organs in a cockroach?
Topic: Excretory Systems in Insects
Correct Answer: D) Malpighian tubules
Detailed Hints:
- Different organisms utilize varying structures for excretion.
- While Flame cells serve this function in Platyhelminthes and nephridia in Annelids, cockroaches, as arthropods, possess Malpighian tubules.
- These structures are pivotal in the excretion process in insects.
- Thus, the correct answer is D, "Malpighian tubules".
Question 20:
What is the term for the rasping tongue found in Molluscs?
Topic: Anatomical Features of Molluscs
Correct Answer: A) Radula
Detailed Hints:
- Molluscs possess several unique anatomical characteristics, which are represented in options A, B, C, and D.
- Among these, the rasping tongue characteristic to molluscs is known as a Radula.
- The Mantle is the organ that secretes the shell, and Haemocyanin is the respiratory pigment in molluscs.
- Therefore, the correct answer is A, "Radula".
Question 21:
How many glomerulus are present in Hemichordata?
Topic: Excretory Systems in Hemichordates
Correct Answer: A) One
Detailed Hints:
- The Hemichordata, represented by the options A, B, C, and D, possess a unique excretory system.
- It consists of a single glomerulus that connects to the blood vessel.
- Hence, the correct answer is A, "One".
Question 22:
Which of the following is not a Nematode?
Topic: Classification of Organisms
Correct Answer: C) Taenia solium
Detailed Hint:
- The organisms listed in options A, B, C, and D belong to different groups, but only one of them is not a Nematode.
- Taenia solium, known as the tapeworm, is actually a flatworm, not a Nematode.
- Therefore, the correct answer is C, "Taenia solium".
Question 23:
Which group of organisms primarily undergoes external fertilization?
Topic: Reproduction in Different Organisms
Correct Answer: A) Mollusca
Detailed Hint:
- The reproductive methods of organisms can vary greatly, as indicated by the options A, B, C, and D.
- Among these, Mollusca primarily utilize external fertilization, a process where eggs and sperm are released into the environment for fertilization.
- Therefore, the correct answer is A, "Mollusca".
Question 24:
Which term refers to insects that experience incomplete metamorphosis?
Topic: Insect Life Cycle
Correct Answer: B) Hemimetabola
Detailed Hint:
- The life cycles of insects can be categorized into different groups, represented by the options A, B, and C.
- Hemimetabola refers to the group of insects that undergo incomplete metamorphosis. In these insects, such as wasps and cockroaches, the immature stages look like small adults and gradually develop into the adult form.
- Therefore, the correct answer is B, "Hemimetabola".
Question 25:
Which of the following statements is not true for Molluscs?
Topic: Characteristics of Molluscs
Correct Answer: C) Jointed appendages
Detailed Hint:
- Molluscs have several distinct characteristics, some of which are represented in options A, B, C, and D.
- However, jointed appendages are not a characteristic of Molluscs. This trait is typically found in Arthropods.
- Therefore, the correct answer is C, "Jointed appendages".
Question 26:
What is one of the problems caused by Enterobius vermicularis?
Topic: Health complications from parasites
Correct Answer: D) All of these
Detailed Hint:
- The options A, B, C, and D represent potential health complications.
- Enterobius vermicularis, also known as the pinworm, can cause a range of issues such as severe anal itching, inflammation of the colon and appendix, which in turn can lead to insomnia and loss of appetite.
- Therefore, the correct answer is D, "All of these".
Question 27:
What serves as a locomotory organ in Neries?
Topic: Locomotion in Different Organisms
Correct Answer: C) Parapodia
Detailed Hint:
- Different organisms use various structures for locomotion, as shown in options A, B, and C.
- In Neries, a type of marine worm, Parapodia act as the locomotory organs, allowing them to swim or crawl.
- Hence, the correct answer is C, "Parapodia".
Question 28:
Which organism is a Tunicate?
Topic: Classification of Organisms
Correct Answer: A) Molgula
Detailed Hint:
- The organisms in options A, B, C, and D belong to various groups.
- Tunicates, also called Urochordates, possess a covering called a tunic which is composed of a substance called tunicin, related to cellulose. An example of a Tunicate is Molgula.
- Therefore, the correct answer is A, "Molgula".
MCQs 29:
Which phylum shares characteristics with the Onychophora group of Arthropoda?
Topic: Characteristics Shared by Different Phyla
Correct Answer: A) Annelida
Detailed Hint:
- Onychophora is a small group within the phylum Arthropoda.
- Arthropods in the group Onychophora share characteristics with organisms from other phyla, such as Annelids (option A).
- Therefore, the correct answer is A, "Annelida".
MCQs 30:
What do annelids use for excretion?
Topic: Excretion in Different Organisms
Correct Answer: A) Nephridia
Detailed Hint:
- The options A, B, C, and D represent different excretory organs found in various organisms.
- In annelids such as earthworms (option A), excretion takes place through nephridia, which are small tubules that filter waste products from the blood.
- Hence, the correct answer is A, "Nephridia".
MCQs 31:
Which organism has a pseudo-heart?
Topic: Circulatory System in Different Organisms
Correct Answer: A) Earthworm
Detailed Hint:
- The options A, B, C, and D represent different organisms.
- Pseudo-hearts (false hearts) are found in earthworms (option A). They are a set of 4-5 pairs of muscular structures that help pump blood throughout the body.
- Therefore, the correct answer is A, "Earthworm".
MCQs 32:
Why is Hemichordata considered half a chordate?
Topic: Classification of Phyla based on Structural Features
Correct Answer: A) Absence of Notochord
Detailed Hint:
- Hemichordata, also known as acorn worms, are often considered half chordates.
- This characterization is based on their structural features, particularly the absence or presence of certain anatomical structures (options A, B, C, and D).
- Hemichordata lacks a Notochord (option A), which is a defining feature of chordates, hence they are considered half chordates.
- Therefore, the correct answer is A, "Absence of Notochord".
MCQs 33:
Which organism is included in Deuterostome?
Topic: Classification Based on Developmental Characteristics
Correct Answer: A) Brittle star
Detailed Hint:
- The options A, B, C, and D present organisms that may be included in either Deuterostome or Protostome.
- Deuterostomes include chordates and echinoderms, while Arthropoda and Annelida are included in Protostomes.
- A brittle star (option A), being an echinoderm, is included in the Deuterostomes.
- Therefore, the correct answer is A, "Brittle star".
MCQs 34:
Which animal possesses an open circulatory system?
Topic: Variations in Animal Circulatory Systems
Correct Answer: C) Grasshopper
Detailed Hint:
- The options A, B, C, and D represent different organisms with different types of circulatory systems.
- In an open circulatory system, the blood is not always contained within a network of blood vessels. Arthropods such as Grasshoppers (option C) have this type of system.
- Therefore, the correct answer is C, "Grasshopper".
MCQs 35:
Which statement is not accurate regarding birds?
Topic: Unique Characteristics of Birds
Correct Answer: B) Presence of nucleated RBCs
Detailed Hint:
- The options A, B, C, and D present different possible characteristics of birds.
- Birds are known to exhibit a range of unique features including the presence of a left ovary (option A), a nictitating membrane (option C), and an amnion (option D).
- However, birds possess nucleated RBCs (option B), contrary to the suggestion of this option, making option B the inaccurate statement.
- Thus, the correct answer is B, "Presence of nucleated RBCs".
MCQs 36:
What is the typical color of testes in mollusks?
Topic: Reproductive Organ Coloration in Mollusks
Correct Answer: A) White
Detailed Hint:
- The options A, B, C, and D represent potential colors of the testes in mollusks.
- Mollusks typically have separate sexes, with the testes typically being white in color (option A), and the ovaries tending to be reddish.
- Therefore, the correct answer is A, "White".
MCQs 37:
In which type of animal can a preen gland be found?
Topic: Preen Gland Presence Across Animal Types
Correct Answer: D) Birds
Detailed Hint:
- The options A, B, C, and D represent different types of animals that may or may not have a preen gland.
- The preen gland, also known as the oil gland, is predominantly found in birds (option D). It secretes a waxy substance that makes their feathers water-resistant and pliable.
- Hence, the correct answer is D, "Birds".
MCQs 38:
Which statement does not accurately reflect the characteristics of Urochordates?
Topic: Unique Features of Urochordates
Correct Answer: C) Notochord exists in adults
Detailed Hint:
- The options A, B, C, and D present different potential characteristics of Urochordates.
- Urochordates, also known as tunicates, are marine invertebrates that exhibit unique features such as the presence of a notochord during their larval stage (option A) and a sessile lifestyle in adulthood (option D).
- However, the notochord in Urochordates is not present in adults (option C), making this option incorrect.
- Thus, the correct answer is C, "Notochord exists in adults".
MCQs 39:
What serves as the excretory organ in Crustaceans?
Topic: Excretory Systems Across Animal Phyla
Correct Answer: B) Green glands
Detailed Hint:
- The options A, B, C, and D represent possible excretory structures found in different organisms.
- In the case of Crustaceans (a subphylum of Arthropods), the primary excretory organ is the green gland (option B).
- Therefore, the correct answer is B, "Green glands".
MCQs 40:
Which one of the following mollusks does not have a ventral foot?
Topic: Anatomical Structures in Mollusks
Correct Answer: B) Oyster
Detailed Hint:
- The options A, B, C, and D represent different species of mollusks, each having its unique characteristics and anatomy.
- While the majority of mollusks, including snails, cuttlefish, and squids, possess a ventral foot for locomotion (options A, C, and D), oysters (option B) do not have this feature.
- Hence, the correct answer is B, "Oyster".
MCQs 41:
Which of the following organisms does not undergo complete metamorphosis (Holometabola)?
Topic: Metamorphosis in Insects
Correct Answer: D) Cockroaches
Detailed Hint:
- The options A, B, C, and D represent different types of insects, each with its unique life cycle and developmental processes.
- Most insects, including butterflies, moths, and beetles, undergo complete metamorphosis (options A, B, and C), which involves four distinct stages: egg, larva, pupa, and adult.
- However, cockroaches (option D) exhibit incomplete metamorphosis, where the young resemble small adults and mature through a series of molts.
- Therefore, the correct answer is D, "Cockroaches".
MCQs 42:
Which is the most substantial phylum within the animal kingdom?
Topic: Animal Kingdom Phyla and Their Sizes
Correct Answer: C) Arthropoda
Detailed Hint:
- The options A, B, C, and D represent various phyla in the animal kingdom.
- When it comes to sheer numbers, the phylum Arthropoda (option C) far outnumbers the others, making it the largest within the animal kingdom.
- Therefore, the correct answer is C, "Arthropoda".
Question 43:
What is the primary respiratory structure in Neries?
Topic: Respiratory Structures in Different Organisms
Correct Answer: B) Gills
Detailed Hint:
- The options A, B, C, and D represent potential respiratory structures in various organisms.
- For Neries, an aquatic annelid (also known as a bristle worm), respiration occurs primarily through gills located under the parapodia (option B).
- Therefore, the correct answer is B, "Gills".
Question 44:
What type of circulatory system do arthropods exhibit?
Topic: Circulatory Systems in Different Organisms
Correct Answer: B) Open type
Detailed Hint:
- The options A, B, C, and D represent possible types of circulatory systems that various organisms may possess.
- Arthropods, a phylum of animals including insects, spiders, and crustaceans, feature an open circulatory system (option B).
- Therefore, the correct answer is B, "Open type".
Question 45:
Which system would be most affected if we coated the sides of a grasshopper with wax?
Topic: Physiology of Insects
Correct Answer: C) Respiratory
Detailed Hint:
- The options A, B, C, and D represent various systems within an organism.
- Grasshoppers, like other insects, breathe through small openings on the sides of their bodies known as spiracles. If these were coated with wax, it would severely impact their ability to respire (option C).
- Hence, the correct answer is C, "Respiratory".
Question 46:
In which organism is the phenomenon of autotomy observed?
Topic: Defense Mechanisms in Different Organisms
Correct Answer: A) Brittle star
Detailed Hint:
- The options A, B, C, and D represent different organisms, each with unique defense mechanisms.
- Autotomy, the act of an organism purposely shedding a body part typically as a self-defense mechanism, is observed in the brittle star (option A).
- Therefore, the correct answer is A, "Brittle star".
Question 47:
Which creature possesses three pairs of walking legs?
Topic: Leg Distribution in Different Organisms
Correct Answer: A) Cockroach
Detailed Hint:
- The options A, B, C, and D represent different creatures, each with varying numbers and arrangements of legs.
- Among the given options, cockroaches (option A) are characteristic of having three pairs of walking legs.
- Therefore, the correct answer is A, "Cockroach".
Question 48:
Which feature is distinctive of the phylum Chordata?
Topic: Characteristics of the Phylum Chordata
Correct Answer: D) All of the above
Detailed Hint:
- The options A, B, C, and D represent possible characteristics of organisms from the phylum Chordata.
- All of the features listed including the presence of a notochord, gill slits, and a dorsal hollow tubular nervous system (options A, B, and C) are typical of chordates.
- Hence, the correct answer is D, "All of the above".
Question 49:
Which of the following is present in birds?
Topic: Anatomical Structures in Birds
Correct Answer: D) Uropygial gland
Detailed Hint:
- The options A, B, C, and D represent different anatomical structures that may or may not be found in birds.
- Out of all the options given, the uropygial gland (option D) is a distinctive structure found in birds, which secretes oils for preening their feathers.
- Therefore, the correct answer is D, "Uropygial gland".
Question 50:
What is the respiratory system in sea urchins composed of?
Topic: Respiratory Systems in Marine Species
Correct Answer: B) Peristomical gills
Detailed Hint:
- The options A, B, C, and D represent various potential components of a sea urchin's respiratory system.
- Sea urchins primarily use peristomical gills and the cloacal respiratory tract for respiration (option B).
- Therefore, the correct answer is B, "Peristomical gills".
Question 51:
What is true for a bird?
Topic: Unique Features of Birds
Correct Answer: D) All of the above
Detailed Hint:
- The options A, B, C, and D represent features that may or may not be true for birds.
- Birds possess air sacs for efficient respiration, hollow bones for a lighter body weight conducive to flight, and wings for flight (option D).
- Hence, the correct answer is D, "All of the above".
Question 52:
Which of the following does not undergo metamorphosis in their life cycle?
Topic: Life Cycles in Different Organisms
Correct Answer: C) Silverfish
Detailed Hint:
- The options A, B, C, and D represent organisms with distinct life cycles.
- While most insects undergo a metamorphosis as part of their life cycle, silverfish, a primitive wingless insect, do not go through a metamorphosis (option C).
- Therefore, the correct answer is C, "Silverfish".
Question 53:
What makes the feathers of birds waterproof?
Topic: Adaptations in Birds
Correct Answer: C) Preen gland
Detailed Hint:
- Options A, B, C, and D denote different types of glands that could potentially contribute to the waterproofing of bird feathers.
- Preen gland (also known as the oil gland) in birds secretes substances that smooth and waterproof their feathers (option C).
- Therefore, the correct answer is C, "Preen gland".
Question 54:
Which of the following statements about the respiratory systems of various creatures is incorrect?
Topic: Respiratory Systems in Diverse Organisms
Correct Answer: D) Insects = Coxal gland
Detailed Hint:
- The options A, B, C, and D represent different organisms and the respective components of their respiratory systems.
- Insects do not utilize a coxal gland for respiration (option D). In insects, the primary organs of excretion are Malpighian tubules.
- Hence, the correct answer is D, "Insects = Coxal gland".
Question 55:
How many fossils are reported in Phylum Mollusca?
Topic: Fossil Record of Molluscs
Correct Answer: C) 35000
Detailed Hint:
- The options A, B, C, and D represent possible numbers of molluscan fossils that have been reported.
- Phylum Mollusca, the second-largest phylum of invertebrates, has a significant fossil record. Specifically, 35000 fossil forms have been reported (option C).
- Therefore, the correct answer is C, "35000".