- Refer the given figure and answer the following questions.
(a) Identify the generic names of organisms A, B and C.
(b) What is the mode of nutrition in organism A? Which
structures supplement its mode of nutrition?
(c) Describe various cells found in the epidermal layer of
body wall of organism B.
(d) To which phylum organism C belongs? How does it
defend itself from its enemies?
SOLUTIONS
CHAPTER-1 : THE LIVING WORLD
- (c) 2. (d) 3. (b) 4. (b) 5. (a)
- (c) 7. (a) 8. (b) 9. (b) 10. (d)
- (d) 12. (b) 13. (c) 14. (a) 15. (c)
- A-(iii); B-(ii); C-(iv); D-(i)
- A-(ii),(iv), (vi); B-(i),(iii); C-(viii); D-(v),(vii)
18.(A) (i) nomenclature (vi) species
(ii) identification (vii) genus
(iii) systematics (viii) Latin
(iv) generic (ix) Greek
(v) specific (x) Roman
(B) Herbarium is a place where fresh dried and pressed
plant specimens, mounted on sheets are kept randomly
systematically. Herbarium is a repository for present
future use. It provides information about the local flora
only as well as flora of distant areas and also about the
ecology of different places. Herbaria are used for correct
and authentic identification of known unknown plants. It
depicts the anatomical morphological variations found in
species.
- (d) 20. (a) 21. (c) 22. (d) 23. (c)
- (b) 25. (c) 26. (d) 27. (c) 28. (b)
- (a) The given figure is of taxonomical hierarchy. Here, A is
Family, B is Order, C is Phylum/Division and D is Kingdom.
(b) Order is one of the obligate category in taxonomic hierarchy
which includes one or more related families one or more
related orders are clustered together in a class.
(c) The family (A), order (B) and phylum/division (C) of Triticum
is poaceae, poales and angiospermae respectively. While
for Felis it is felidae, carnivora and chordata respectively.
- (a) A–A store house of collected plant specimens that are
dried, pressed and preserved on sheets.
B–Collection and maintenance of living plants for reference.
C–Enclosed areas where animals are kept in open
enclosures instead of cages.
D–A place used for storage, preservation and exhibition of
objects of natural history, art and antiquities.
E–A dichotomic table of alternate characteristics known as
couplet and each statement of key is called lead.
(b) (i) 30×45
(ii) Moscow
(iii) ex-situ
(iv) Andaman and Nicobar Islands
(v) indented
(vi) bracketed
CHAPTER-2 : BIOLOGICAL CLASSIFICATION- (d) 2. (c) 3. (d) 4. (c) 5. (b)
- (a) 7. (b) 8. (a) 9. (d) 10. (d)
- (d) 12. (a) 13. (c) 14. (d) 15. (c)
- A-(iii); B-(iv); C-(i); D-(ii)
- A-(i, vi); B-(iv, vii); C-(ii, iii); D-(v, viii)
18.(A) (i) smallest (vi) single DNA duplex
(ii) Monera (vii) histones
(iii) pleural fluid (viii) heterotrophic
(iv) pleuropneumonia (ix) mycoplasmal urethritis
(v) 0.1 – 0.15 mm (x) little leaf disease
(B) Sclerotia and rhizomorphs are the means of sexual
vegetative reproduction in fungi. Rhizomorphs Sclerotia
are perennating bodies made up of compact masses of
hyphae whereas sclerotia rhizomorphs are rope like twisted
subterranean masses of hyphae. Vegetative Asexual
reproduction in fungi occurs through spores. The sexually
produced spores are called mitospores, meiospores, e.g.,
basidiospores, conidia ascospores , etc. The phenomenon
of having two genetically similar different and compatible
sexual strains in same separate thalli is known as
heterothallism. - (a) 20. (c) 21. (a) 22. (a) 23. (c)
- (d) 25. (b) 26. (a) 27. (c) 28. (b)
- (a) : In the given life cycles, A represents life cycle with
zygotic meiosis while B represents life cycle with gametic
meiosis.
(b) Life cycle showing zygotic meiosis is found in dinoflagellates
and cellular slime moulds. Life cycle showing gametic
meiosis is found in majority of protozoan protists, diatoms
and acellular slime moulds.
(c) Differences between life cycle with zygotic meiosis (A) and
life cycle with gametic meiosis (B) are as follows: