Taxonomy (Biology) Part-II

Total Questions: 50

11. Termites are also known as: [Uttarakhand P.C.S. (Mains) 2002]

Correct Answer: (c) White ants
Solution:Termites are eusocial insects that are classified in the taxonomic rank of infraorder Isoptera. Termites are also known as white ants.

12. Glow-worm is: [Uttarakhand P.C.S. (Mains) 2002]

Correct Answer: (b) An insect
Solution:Glow-worm is a medium to large sized invertebrate luminous insect, that emits light. The light of the glow-worm larva is given off by small tubes ending around the glow-worm anus, as a product of excretion.

13. The presence of parasites within parasites is a phenomenon known as: [Uttarakhand P.C.S. (Mains) 2002]

Correct Answer: (b) Hyperparasitism
Solution:A hyperparasite is a parasite whose host is also a parasite. This form of parasitism is especially common among entomophagous parasites. The term is used loosely to refer also to parasitoids whose hosts are parasites or parasitoids.

Hyperparasites are found mainly among the wasp-waisted Apocrita within the Hymenoptera, and in two other insect orders, the Diptera (true flies) and Coleoptera (beetles).

14. Female Anopheles can be distinguished from female Culex because it sits : [68th B.P.S.C. (Pre) 2022]

Correct Answer: (b) at an angle with substratum
Solution:There are differences between female culex and female anopheles in their feeding pattern, size, eggs, and habitat. Female Anopheles body rests at an angle to the substratum while Culex rests parallel to the substratum. Adult Anopheles can be identified by clear spots on the wings.

Both males and females rest with their abdomens sticking up in the air rather than parallel to the surface on which they are resting. Anopheles mosquito makes angles its body at around 45 degrees from the surface.

15. Which one of the following is not an insect? [U.P.P.C.S. (Spl.) (Pre) 2008 ,U.P. U.D.A./L.D.A. (Mains) 2010, Jharkhand P.C.S. (Pre) 2021]

Correct Answer: (b) Spider
Solution:Spiders belong to a group of animals called 'Arachnids'. Arachnids are creatures with two body segments, eight legs and no wings or antennae. All spiders are predators and many eat each other. Rest three options are insects. They have six legs, while spider has eight legs. Thus spider is not an insect.

16. Spiders are different from insects because they have— [R.A.S./R.T.S. (Pre) 1996]

Correct Answer: (b) Eight legs
Solution:Spiders belong to a group of animals called 'Arachnids'. Arachnids are creatures with two body segments, eight legs and no wings or antennae. All spiders are predators and many eat each other. Rest three options are insects. They have six legs, while spider has eight legs. Thus spider is not an insect.

17. Which is not insect amongst following? [Chhattisgarh P.C.S. (Pre) 2011]

Correct Answer: (d) Spider
Solution:Spiders belong to a group of animals called 'Arachnids'. Arachnids are creatures with two body segments, eight legs and no wings or antennae. All spiders are predators and many eat each other. Rest three options are insects. They have six legs, while spider has eight legs. Thus spider is not an insect.

18. The silk produced by spiders is called : [U.P. R.O./A.R.O. (Pre) 2017]

Correct Answer: (b) Gossamer silk
Solution:Spider silk is protein fiber spun by spiders. It is also known as 'Gossamer silk'. Spider silk is an extremely strong material. It is one of the most miraculous natural substances on Earth. Most building materials are either strong or elastic, but spider silk is both. It has been often described as stronger than steel (which is not quite accurate, but close).

19. At which stage in its life cycle, does the silkworm yield the fibre of commerce? [Chhattisgarh P.C.S (Pre) 2005]

Correct Answer: (c) Pupa 
Solution:

The silkworm produces the silk of commercial importance in pupa stage of its life cycle. The egg is the first stage of the silkworm's life cycle. The larva is the vegetative stage where growth takes place.

In pupa stage, as the silkworm prepares to pupate, it spins a protection cocoon. About the size and color of a cotton ball, the cocoon is constructed from one continuous strand of silk perhaps 1.5 km long.

The silk cocoon serves as protection for the pupa. Imago is the adult stage which completes the life cycle of a silkworm.

20. Silkworm grows on— [Uttarakhand Lower Sub. (Pre) 2010]

Correct Answer: (d) Mulberry leaves
Solution:The silkworm is the larva or caterpillar of the domesticated silkmoth, Bombyx mori. It is an economically important insect, being a primary producer of silk. It grows on leaves of the mulberry tree.