Free Biodiversity and Variety of Life MCQs with Answers
3,130 Biodiversity and Variety of Life MCQs from Biology, each with the correct answer and a written explanation of why it is correct. Free and unlimited, with no account needed.
Biological classification uses taxonomic ranks, binomial nomenclature and shared characteristics to organize life into kingdoms. The major groups include prokaryotes, protists, fungi, plants and animals, with comparisons based on cell type, cell wall, nutrition, body organization, reproduction and evolutionary relationships; prokaryotes lack a membrane-bound nucleus.
Last updated
3,130 questions · page 42 of 157
- A. Frog, lizard and cockroach
- B. Ascaris, housefly and frog
- C. Housefly, earthworm and mosquito
- D. Butterfly, frog and mosquito
Explanation: In butterfly, the larval stage is known as catterpillar, in frog it is known as tadpole, while in mosquito it is known as wriggler.
Correct answer: Butterfly, frog and mosquito- A. Species
- B. Genus
- C. Family
- D. order
Explanation: Gorillas, chimpanzees, monkeys and humans belong to the same order i.e., primates.
Correct answer: order- A. Absence of neck
- B. Muscular diaphragm between thorax and abdomen
- C. Extraabdominal testes to avoid high temperature of body
- D. Absence of body hair
Explanation: Whale, bat and rat are mammals. Diaphragm is present in mammals. The diaphragm separates the thoracic cavity (with lung and heart) from…
Correct answer: Muscular diaphragm between thorax and abdomen- A. Asteriodea
- B. Ophiuroidea
- C. Holothuroidea
- D. Crinodiea
Explanation: Starfish belong to the Class Asteroidea, characterized by the presence of five or more arms not sharply set off from a central disc.
Correct answer: Asteriodea- A. Bivalvia
- B. Gastropoda
- C. Pelecypoda
- D. Cephalopoda
Explanation: In cephalopodas, paired eyes are large, efficient and bulge from the dorsolateral sides of the head.
Correct answer: Cephalopoda- A. Mouth parts/colour
- B. Sitting posture
- C. Antennae/wings
- D. Feeding habits
Explanation: Two common mosquito genera, the Anopheles and Culex can be easily identified by their sitting postures.
Correct answer: Sitting posture- A. Pygostyle
- B. Larynx
- C. Syrinx
- D. Synsacrum
Explanation: At the posterior end or base of the trachea, at its junction with the bronchi, is found a special structure, the syrinx or voice box…
Correct answer: Syrinx- A. Cysticercus
- B. Rhabditiform
- C. Hexacanth
- D. Onchosphere
Explanation: In Ascaris, the rhabditiform larva in the first stage is not infective.
Correct answer: Rhabditiform- A. Male organs occur in posterior proglottides
- B. Male organs occur in anterior proglottides
- C. Female organs occur in anterior proglottides
- D. Mature proglottides contain both male and female organs
Explanation: There are about 450 mature proglottids forming the middle part of strobila. These are large and squarish in outline.
Correct answer: Mature proglottides contain both male and female organs- A. Kangaroo
- B. Platypus
- C. Koala
- D. Whale
Explanation: The Duckbilled platypus is an egg laying mammal. It is found in the rivers in eastern Australia and Tasmania.
Correct answer: Platypus- A. Pronephros
- B. Metanephros
- C. Mesonephros
- D. Opisthonephros
Explanation: Kidney of adult rabbit is metanephros. It is formed from the posterior end of the nephrogenic mesoderm which is displaced somewhat…
Correct answer: Metanephros- A. Pediculus
- B. Cimex
- C. Musca
- D. Xenopsylla
Explanation: Musca is the zoological name of the house fly which is regarded as the mechanical carrier of many diseases.
Correct answer: Musca- A. Pheromone
- B. Thyroxine
- C. Ecdysone
- D. All of these
Explanation: Ecdysone is a steroid hormone, secreted by a pair of prothoracic glands in the thorax of insects and by Yorgans in crustaceans, that…
Correct answer: Ecdysone- A. Flame cells
- B. Protonephridia
- C. Malpighian tubules
- D. Green glands
Explanation: Flame cells are scattered throughout the parenchyma from which they remove metabolic wastes.
Correct answer: Flame cells- A. Tapeworm
- B. Roundworm
- C. Pinworm
- D. Liver fluke
Explanation: Cysticercus is the larval stage of tapeworm which is characterised by a large vesicle and one scolex.
Correct answer: Tapeworm- A. Stratum corneum
- B. Epidermis
- C. Dermis
- D. Stratum malpighi
Explanation: The stratum corneum ("the horny layer") is the outermost layer of the epidermis (the outermost layer of the skin).
Correct answer: Stratum corneum- A. Excretory organs of insects
- B. Excretory organs of annelids
- C. Respiratory organs of insects
- D. Respiratory organs of annelids.
Explanation: In insects Malpighian tubules are attached to the alimentary canal at the extreme anterior end of hindgut.
Correct answer: Excretory organs of insects- A. Absence of scolex hooks
- B. Absence of scolex hooks and uterine branching
- C. Absence of scolex hooks and presence of both male and female reproductive organs
- D. Presence of scolex hooks
Explanation: The beef tapeworm Taenia saginata is similar to the pork tapeworm Taenia solium, in structure and life history.
Correct answer: Absence of scolex hooks- A. Hairy skin
- B. True placentation
- C. Ovoviviparity
- D. Glandular skin
Explanation: Eutheria is a taxon containing the placental mammals, such as humans. Nevertheless, all Eutherians are placental mammals.
Correct answer: True placentation- A. Pelvic girdle
- B. Skull
- C. Hind limbs
- D. Pectoral girdle/clavicles.
Explanation: The wishbone, known in anatomy as the furcula, is a sternum bone found in birds which is shaped like the letter Y.
Correct answer: Pectoral girdle/clavicles.