CBSE Class 9 Biology Diversity In Living Organisms Worksheet Set B

Question:  Why bryophytes and pteriodophytes grow in moist and shady places? 
Answer : Bryophytes and pteriodophytes need water for their reproduction. Because reproduction in these organisms can take place when water helps in carrying male gamete to female gamete.

Question: What are unicellular organisms? Give an example for unicellular organisms?
Answer : One celled or Single celled organisms are called unicellular organisms.
Example : Chlamydomonas, Amoeba, Euglena.

Question: What is evolution?
Answer : Evolution is the change in heritance characteristics of organism over generations.

Question: Who made 1st attempt for scientific basis of classification?
Answer : Aristotle.

Question: On what morphological criteria Aristotle classified the plants?
Answer : Based on the morphological nature of the stem.

Question. What is biodiversity?
Answer : Various types of living organism found in a particular region is called biodiversity.

Question:Name the reproductive organ of plants.
Answer : Flower.

Question: What are gymnosperms?
Answer : Gynosperms are the group of plants that bear naked seeds, e.g., pines, deodar.

Question: What are cotyledons?
Answer : Plant embryos in seeds have structures called cotyledons. Cotyledens are also known as seed leaves.

Question: Name the five kingdoms of living organisms?
Answer :
(1) Kingdom — Monera,
(2) Kingdom — Protista,
(3) Kingdom — Fungi (mycota),
(4) Kingdom — Plantae (metaphyta),
(5) Kingdom — Animalia (metazoan).

Question: Define radial symmetry.
Answer : When any plane axis passing through the central axis of the body divides the animal into two halves that are mirror image, is called radial symmetry. For example : sponges, starfish.

Question: Give example of two fish which have skeleton made up of both bone and cartilage.
Answer : Tuna and rohu.

Question: What is biological classification?
Answer : Grouping of organisms based on similarities and dissimilarities is called biological classification.

Question: What are heterotrophic bacteria?
Answer : The bacteria which do not synthesize their own food but depend on other organisms or dead organic matter are called heterotrophic bacteria.

Question: Due to global warming coral is getting diminished in all the oceans/ water bodies. People in Lakshadweep island protects their corals by not allowing people/ tourist to take few pieces away.
(a) Name the phylum of coral.
(b) What is coral made up of?
(c) What values of people in Lakshadweep island is reflected?
Answer :
(a) Phylum of coral is coelenterata.
(b) Coral is made up of calcium carbonate.
(c) People in Lakshadweep island reflect the value of being responsible (Citizen, respecting environment and nature).

Question: What are cyano bacteria?
Answer : Bacteria that obtain their energy through photosynthesis

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(Q.1) Classification according to habitat was done by:
(A) Darwin
(B) Aristotle
(C) Linnaeus
(D) Haeckel

(Q.2) ‘The Origin of Species’ was written by:
(A) Linnaeus
(B) Whittaker
(C) Parasara
(D) Darwin

(Q.3) Diversity of life forms is:
(A) Biology
(B) Ecology
(C) Biodiversity
(D) Botany

(Q.4) Five kingdom classification was proposed by:
(A) Woese
(B) Haeckel
(C) Darwin
(D)Whittaker

(Q.5) The highest taxon in the hierarchy of classification is:
(A) Kingdom
(B) Class
(C) Phylum
(D) Genus

(Q.6) Mycoplasma belongs to:
(A) Protista
(B) Monera
(C) Thallophyta
(D) Nematoda

(Q.7) Unicellular eukaryotic organisms belongs to this group:
(A) Monera
(B) Plantae
(C) Protista
(D) Animalia

(Q.8) Symbiotic relationship is seen in:
(A) Lichens
(B) Yeast
(C) Mushroom
(D) Rusts

(Q.9) Predominantly aquatic plant forms are seen in:
(A) Bryophyta
(B) Pteridophyta
(C) Thallophyta
(D) Gymnosperms

(Q.10) Amphibians of the plant kingdom are:
(A) Angiosperms
(B) Bryophytes
(C) Gymnosperms
(D) Pteridophytes

(Q.11) Marsilea and Horse-tails belong to:
(A) Thallophyta
(B) Angiosperms
(C) Pteridophyta
(D) Bryophyta

(Q.12) Naked seeds, Perennial, Evergreen,Woody plants are characteristic features of:
(A) Gymnosperms
(B) Bryophyta
(C) Angiosperms
(D) Pteridophyta

(Q.13) ‘Seed leaves’ are:
(A) Perisperm
(B) Endosperm
(C) Radicle
(D) Cotyledons

(Q.14) Canal system is seen in:
(A) Cnidaria
(B) Annelida
(C) Porifera
(D) Arthropoda

(Q.15) Dorsiventrally flat bodies is a feature of:
(A) Arthropoda
(B) Platyhelminthes
(C) Nematoda
(D) Annelida

(Q.16) Elephantiasis is caused by:
(A) Ascaris
(B) Tapeworm
(C) Liverfluke
(D)Wuchereria

(Q.17) The largest group of animals is seen in:
(A) Porifera
(B) Annelida
(C) Arthropoda
(D) Nematoda

(Q.18) Calcium carbonate structures form the skeleton of:
(A) Platyhelminthes
(B) Echinodermata
(C) Protochordata
(D) Nematods

(Q.20) Cartilaginous skeleton is seen in:
(A) Tuna
(B) Sharks
(C) Mandarin fish
(D) Flying fish

(Q.21) Mucus glands in the skin and three chambered heart are seen in:
(A) Reptilia
(B) Aves
(C) Pisces
(D) Amphibia

(Q.22) The reptile with a four chambered heart is:
(A) Crocodile
(B) Turtle
(C) Lizards
(D) Snakes

(Q.23) The organ modified for flight in birds is:
(A) Hindlimbs
(B) Neck
(C) Forelimbs
(D) Fingers

(Q.24) Brood pouch is present in:
(A) Male hippocampus
(B) Female hippocampus
(C) Anabes
(D) Exocoetus

(Q.25) Egg laying mammals are:
(A) Kangaroo and Bat
(B) Echidna and Platypus
(C) Echidna and Rat
(D) Platypus and Whales