Biology

The Living World

Question:

A ball of snow when rolled over snow increases in mass, volume and size. Is this comparable to growth as seen in living organisms? Why?

Answer:

Growth is characteristic feature of all living organisms. Increase in mass and increase in number of individuals are twin characteristics of growth. Living organisms show internal growth due to addition of materials and formation of cells inside the body. The ball of snow is non-living object. While rolling over snow, it gathers more snow on its surface, so it increases in size by physical process, not by biological process. So, the growth of snow ball cannot be compared to growth seen in living organisms.
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The Living World

Q 1.

Some of the properties of tissues are not the constituents of its cells. Give three examples to support the statement.

Q 2.

What does ICZN stand for?

Q 3.

Match the following and choose the correct option.

A. Family (0 tuberosum
B. Kingdom (ii) Polymoniales
C. Order (iii) Solarium
D. Species (iv) Plantae
E. Genus (v) Solanaceae

Options:
(a) D—(i), C—(ii), E—(iii), B—(iv), A-(v)
(b) E—(i), D—(ii), B—(iii), A—(iv), C- (c) D-C), E—(ii), B—(iii), A—(iv), C-(v)
(d) E—(i), €—(ii), B—-(iii), A-(iv), D-(v)

Q 4.

Amoeba multiplies by mitotic cell division. Is this phenomena growth or reproduction? Explain.

Q 5.

A plant may have different names in different regions of the country or world. How do botanists solve this problem?

Q 6.

Amoeba multiplies by mitotic cell division. Is this phenomena growth or reproduction? Explain.

Q 7.

Properties of cell organelles are not always found in the molecular constituents of cell organelles. Justify.

Q 8.

Given below is the scientific name of mango. Identify the correctly written name.
Mangifera Indica Mangifera indica

Q 9.

What does ICZN stand for?

Q 10.

What is a monograph?

Q 11.

Brassica compestris Linn
a. Give the common name of the plant.
b. What do the first two parts of the name denote?
c. Why are they written in italics?
d. What is the meaning of Linn written at the end of the name?

Q 12.

Linnaeus is considered as Father of Taxonomy. Name two other botanists known for their contribution to the field of plant taxonomy?

Q 13.

What is the similarity and dissimilarity between "whole moong daal"and "broken moong daal"in terms of respiration and growth? Based on these parameters classify them into living or nonliving?

Q 14.

Why are the classification systems changing every now and then?

Q 15.

Which is the largest botanical garden in the world? Name a few well known botanical gardens in India.

Q 16.

A student of taxonomy was puzzled when told by his professor to look for a key to identify a plant. He went to his friend to clarify what ‘Key’ the professor was referring to? What would the friend explain to him?

Q 17.

Try to collect all the currently accepted meanings for the word ‘species’. Discuss with your teacher the meaning of species in case of higher plants and animals on one hand, and bacteria on the other hand.

Q 18.

Do you consider a person in coma-living or dead?

Q 19.

Some of the properties of tissues are not the constituents of its cells. Give three examples to support the statement.

Q 20.

International Code of Botanical Nomenclature (ICBN) has provided a code for classification of plants. Give hierarchy of units of classification botanists follow while classifying plants and mention different’Suffixes’ used for the units.

Q 21.

How is a key helpful in the identification and classification of an organism?

Q 22.

What is a Monograph?

Q 23.

Couplet in taxonomic key means .

Q 24.

Define metabolism.

Q 25.

Linnaeus is considered as Father of Taxonomy. Name two other botanists known for their contribution to the field of plant taxonomy.

Q 26.

Can you identify the correct sequence of taxonomical categories?
(a) Species —> Order —> Phylum —> Kingdom
(b) Genus—) Species—> OrderKingdom
(c) Species —> Genus —>Order —> Phylum

Q 27.

A ball of snow when rolled over snow increases in mass, volume and size. Is this comparable to growth as seen in living organisms? Why?

Q 28.

In a given habitat we have 20 plant species and 20 animal species. Should we call this as ‘diversity’ or ‘biodiversity’? Justify your answer.

Q 29.

The number and kinds of organism is not constant. How do you explain this statement?

Q 30.

What different criteria would you choose to classify people that you meet often?

Q 31.

What do we learn from identification of individuals and populations?

Q 32.

What is meant by living? Give any four defining features of life forms.

Q 33.

Why are living organisms classified?

Q 34.

Properties of cell organelles are not always found in the molecular constituents of cell organelles. Justify.

Q 35.

A ball of snow when rolled over snow increases in mass, volume and size. Is this comparable to growth as seen in living organisms? Why?

Q 36.

How do you prepare your own herbarium sheets? What are the different tools you carry with you while collecting plants for the preparation of a herbarium? What information should a preserved plant material on the herbarium sheet provide for taxonomical studies?

Q 37.

Illustrate the taxonomical hierarchy with suitable examples of a plant and an animal.

Q 38.

Define and understand the following terms:
(i) Phylum (ii) Class (iii) Family
(iv) Order (v) Genus

Q 39.

Which is the largest botanical garden in the world? Name a few well known botanical gardens in India.

Q 40.

In a given habitat we have 20 plant species and 20 animal species. Should we call this as ‘diversity' or ‘biodiversity'? Justify your answer. –

Q 41.

Define metabolism.

Q 42.

What is the difference between flora, fauna and vegetation? Eichhornia crassipes is called as an exotic species while Rauwolfia serpentina is an endemic species in India. What do these terms exotic and endemic refer to?

Q 43.

A scientist has come across a plant which he feels is a new species. How will he go about its identification, classification and nomenclature.

Q 44.

Brinjal and potato belong to the same genus Solarium, but to two different species. What defines them as separate species?

Q 45.

Metabolism is a defining feature of all living organisms without exception. Isolated metabolic reactions in vitro are not living things but surely living reactions. Comment.

Q 46.

Do you consider a person in coma-living or dead?

Q 47.

Define a taxon. Give some example of taxa at different hierarchical levels.

Q 48.

A plant species shows several morphological variations in response to altitudinal gradient. Whengrownundersimilarconditionsofgrowth, the morphological variations disappear and all the variants have common morphology. What are these variants called?

Q 49.

What are taxonomical aids? Give the importance of herbaria and museums. How are Botanical gardens and Zoological parks useful in conserving biodiversity?

Q 50.

What are taxonomical aids? Give the importance of herbaria and museums. How are Botanical gardens and Zoological parks useful in conserving biodiversity?