Question 1

Question 55:(a) Differentiate between meristematic and permanent tissues in plants.(b) Define the process of differentiation.(c) Name any two simple and two complex permanent tissues in plants.

Accepted Answer

Answer:(a) (b) The loss of division ability of cells by taking up a permanent shape, size and function is called differentiation. The cells develop into tissues and organ by the process of differentiation. (c) Simple permanent tissue- parenchyma tissue and sclerenchyma tissue.Complex permanent tissue- xylem and pholem tissue.

Question 2

Question 1:
Find out incorrect sentence

Accepted Answer

Answer:
Kingdom Monera consists of prokaryotic organisms which are characterized by the absence of well defined nucleus. It includes bacteria, cyanobacteria etc.
Hence, the correct answer is option D.

Question 3

Question 2:Which among the following has specialised tissue for conduction of water?(i) Thallophyta(ii) Bryophyta(iii) Pteridophyta(iv) Gymnosperms

Accepted Answer

Answer:
Division Thallophyta and Bryophyta does not have specialized tissue for conduction of water. These tissues first appeared in Pteridophytes and are found in Gymnosperms as well. 
Hence, the correct answer is option C.

Question 4

Question 3:Which among the following produce seeds?

Accepted Answer

Answer:
Gymnosperms are the group of plants which bear naked seeds. The lower group of plants (Thallophyta, Bryophyta and Pteridophyta) do not bear seeds. 
Hence, the correct answer is option D.

Question 5

Question 4:Which one is a true fish?

Accepted Answer

Answer:
Dogfish is the one among all which is a true fish. Jellyfish is a coelentrate, Starfish belongs to echinodermata and Silverfish is an arthropod.
Hence, the correct answer is option C.

Question 6

Question 5:Which among the following is exclusively marine?

Accepted Answer

Answer:
Echinodermata is the only among these groups which are exclusively marine and all other phylums are found in freshwater also.
Hence, the correct answer is option B.

Question 7

Question 6:
Which among the following have open circulatory system?
(i) Arthropoda
(ii) Mollusca
(iii) Annelida
(iv) Coelenterata

Accepted Answer

Answer:
Annelida and Coelenterata possess closed circulatory system whereas Arthropods and Mollusca possess an open circulatory system.
Hence, the correct answer is option A.

Question 8

Question 7:In which group of animals, coelom is filled with blood?

Accepted Answer

Answer:
Due to the presence of open circulatory system, the coelom of arthropod is filled with blood (haemocoel).  
Hence, the correct answer is option A.

Question 9

Question 8:Elephantiasis is caused by

Accepted Answer

Answer:Elephantiasis is caused by Wuchereria which is a human parasite belonging to phylum Aschelminthes (Nematoda).​Hence, the correct answer is option A.

Question 10

Question 9:Which one is the most striking or (common) character of the vertebrates?

Accepted Answer

Answer:
Presence of triploblastic condition, gill pouches, and coelom can be found in invertebrates also but notochord is exclusively present in vertebrates.
​Hence, the correct answer is option A.

Question 11

Question 10:Which among the following have scales?(i) Amphibians(ii) Pisces(iii) Reptiles(iv) Mammals

Accepted Answer

Answer:
Pisces and reptiles have scales on their body whereas amphibians and mammals don’t have scales.
​Hence, the correct answer is option C.

Question 12

Question 11:Find out the false statement

Accepted Answer

Answer:
Amphibians show external fertilization, hence cannot be categorized as oviparous or viviparous. Some fishes and reptiles are viviparous also.
Hence, the correct answer is option D.

Question 13

Question 12:Pteridophyta do not have

Accepted Answer

Answer:
Plant body of Pteridophyta is differentiated into root, stem and leaves. They do not bear flowers. Angiosperms are the only group of plants that bear flowers.
Hence, the correct answer is option C.

Question 14

Question 13:Identify a member of porifera

Accepted Answer

Answer:
Spongilla belongs to phylum Porifera. Euglena is a protozoan which belongs to kingdom Protists, Penicillium belongs to kingdom Fungi and Hydra belongs to phylum Coelenterata.
Hence, the correct answer is option A.

Question 15

Question 14:
Which is not an aquatic animal?

Accepted Answer

Answer:
Filaria is not an aquatic animal. It is a parasite that causes a parasitic disease (filariasis). Filariasis is caused by Wuchereria. 
Hydra, jelly fish and corals are  coelenterates and are found in aquatic enviornment.
Hence, the correct answer is option D.

Question 16

Question 15:Amphibians do not have the following

Accepted Answer

Answer:
Amphibians are characterized by the presence of three chambered heart, gills or lungs for respiration and mucus glands on skin to keep it moist. They do not have scales on their body.
Hence, the correct answer is option D.

Question 17

Question 16:Organisms without nucleus and cell organelles belong to(i) fungi(ii) protista(iii) cyanobacteria(iv) archaebacteria

Accepted Answer

Answer:
Both archaebacteria and cyanobacteria are prokaryotes and belongs to the kingdom Monera which is characterized by the absence of well defined nucleus and membrane bound cell organelles.
Hence, the correct answer is option B.

Question 18

Question 17:Which of the following is not a criterion for classification of living organisms?

Accepted Answer

Answer:
Height of the plant is not a reliable criteria for classification of living organism as height can be affected by several factors such as environment, habitat, nutrition etc. besides genetic factor.
Hence, the correct answer is option D.

Question 19

Question 18:The feature that is not a characteristic of protochordata?

Accepted Answer

Answer:
The body of Protochordata is bilaterally symmetrical, triploblastic and its a coelomate. At a certain stage of their lives they develop notochord and also have an open circulatory system. The feature of jointed legs is found in arthropods.
Hence, the correct answer is option C.

Question 20

Question 19:The locomotory organs of Echinodermata are

Accepted Answer

Answer:
Tube feet are the locomotory organ of Echinodermata. They not only provide locomotion but also helps in the process of respiration and capturing food. 
Hence, the correct answer is option A.

Chapter 7 : Diversity in Living Organisms