Which of the following factors exclusively affects reproduction in seasonal breeders, both plants and animals?
Water
Temperature
Photoperiod
All of these
Correct Answer :
C. Photoperiod
Photoperiod is the physiological reaction of organisms to the length of day or night. It occurs in plants and animals. It can also be defined as the developmental responses of plants to the relative lengths of light and dark periods. Photoperiod exclusively affects the reproduction in seasonal breeders, both plants and animals.
Related Questions
The practical purpose of classification of living organisms is to
explain the origin of living organsims.
trace the evolution of living organsims.
name the living organisms.
facilitate identification of unknown organisms.
Which of the following statements is incorrect?
The scientific name for humans is Homo sapiens.
Organisms placed in the same genus are least closely related.
Moving from species to kingdom, more different species are included in each higher category.
Species that are in the same genus share very specific characteristics.
Which of the following statements (i - vi) are correct ?
(i) Growth cannot be taken as a defining property of living organism.
(ii) Dead organism does not grow.
(iii) Reproduction cannot be an all inclusive defining characteristic of living organisms.
(iv) No non-living object is capable of replicating itself.
(v) Metabolism in a test tube is non-living.
(vi) Metabolism is a defining feature of all living organisms.
(i) and (iii)
All except (v)
All except (iii)
All of these
Each category of taxonomic hierarchy refers to as a unit of ______.
systematic
identification
nomenclature
classification
Match column-I (Biological name) with column-II (Class) and choose the correct option.
| Column-I | Column-II |
|---|---|
| (Biological name) | (Class) |
| A. Homo sapiens | I. Dicotyledonae |
| B. Musca domestica | II. Mammalia |
| C. Mangifera indica | III. Monocotyledonae |
| D. Triticum aestivum | IV. Insects |
A IV; B II; C I; D III
A II; B IV; C III; D I
A II; B IV; C I; D III
A II; B I; C IV; D III
The sum total of all the chemical reactions occurring in our body is known as
metabolism
growth
regeneration
reproduction
Which one of the following taxonomical aid is used for identification of plants and animals based on similarities and dissimilarities?
Flora
Keys
Monographs
Catalogues
Which one of the taxonomic aids can give comprehensive account of complete compiled information of any one genus or family at a particular time?
Taxonomic key
Flora
Herbarium
Monograph
Match the common name given in column I with their taxonomic category family given in column II and choose the correct combination from the options given below.
| Column-I | Column-II |
|---|---|
| (Common Name) | (Taxonomic categoryFamily) |
| A. Man | I. Poaceae |
| B. Datura | II. Anacardiaceae |
| C. Mango | III. Solanaceae |
| D. Wheat | IV. Hominidae |
A IV, B III, C II, D I
A IV, B III, C I, D II
A I, B II, C III, D IV
A I, B III, C II, D IV
Select the correct statements (i-v) regarding taxonomic categories.
(i) Each step or rank in hierarchy is called taxonomic category.
(ii) Species is a group of individual organisms with fundamental similarities capable of breeding among themselves.
(iii) Taxonomic studies of all unknown organisms have led to the development of common categories like kingdom, phylum or division, class, order, family, genus and species.
(iv) Lower the category, greater is the difficulty of determining the relationship to other taxa at the same level.
(i) & (ii) only
(ii) & (iv) only
(i), (ii) & (iii) only
All of the above
Cell division occurs _______ in plants and _______ in animals.
continuously, only upto a certain age
only upto a certain age, continuously
continuously, never
once, twice
Which of the following taxonomic aid provides information for the identification of names of species found in an area?
Monograph
Manual
Flora
Periodical
Which of the following statement(s) is/are correct ?
(i) All living organisms have ability to respond the environment stimuli which could be physical, chemical or biological.
(ii) Plants respond to external factors like light, water, temperature, other organisms, pollutants, etc.
(iii) Photoperiod affects the process of reproduction.
(iv) Human being is the only organism who has self consciousness.
Only (i)
Both (ii) and (iii)
Both (i) and (iv)
All of these
Which of the following taxonomical aids is being described by the given statements (i-iv) ?
(i) They generally established in educational institutes.
(ii) They have collections of preserved plant and animal specimens for study and reference.
(iii) Insects are preserved in boxes after collecting, killing and pinning.
(iv) They often have collections of skeletons of animals too.
Herbarium
Museum
Zoological parks
Botanical gardens
In majority of higher animals and plants, _____ and _____ are mutually exclusive events.
growth; nutrition
nutrition; consciousness
growth; reproduction
reproduction; consciousness
Refer the botanical name of wheat Triticum aestivum and identify the statement which correctly describes it.
The second word belongs to genus and starts with a small letter.
Both the words Triticum aestivum denote the specific epithet.
The first word Triticum denotes the genus which starts with a capital letter.
The first word Triticum denotes the specific epithet while the second word denotes the genus.
Which of the following statements are not correct ?
(i) Lower the taxon, more are the characteristics that the members within the taxon share.
(ii) Order is the assemblage of genera which exhibit a few similar characters.
(iii) Cat and dog are included in the same family Felidae.
(iv) Binomial nomenclature was introduced by Carolus Linnaeus.
(i), (ii) and (iii)
(ii), (iii) and (iv)
(i) and (iv)
(ii) and (iii)
The order generally ends with
ales
aceae
eae
none of these
Statement 1: Information given on the label of herbarium sheets does not include family.
Statement 2: Families are characterized on the basis of reproductive features of plant species only.
Statement 1 and 2 are true and statement 2 is the correct explanation for statement 1.
Statement 1 and 2 are true but statement 2 is not a correct explanation for statement 1.
Statement 1 is true and statement 2is false.
Both the statements are false.
Binomial nomenclature means
one name given by two scientists.
one scientific name consisting of a generic and specific epithet.
two names, one latinized, other of a person.
two names of same plant.
Which of the following is not a characteristic of life?
Reproduction
Complex chemical organization
Adaptation to environmental changes
Differentiation from cells to tissues
Two animals which are the members of the same order must also be the members of the same __________.
class
family
genus
species
Taxonomic hierarchy refers to
step-wise arrangement of all categories for classification of plants and animals.
a group of senior taxonomists who decide the nomenclature of plants and animals.
a list of botanists or zoologists who have worked on taxonomy of a species or group.
classification of a species based on fossil record.
Which of the following statement(s) is/are not correct ?
(i) Reproduction is the production of progeny possessing features dissimilar to their parents.
(ii) The fungi, the filamentous algae, the protonema of mosses, all multiply by budding.
(iii) Many organisms like mules, sterile worker bees do not reproduce.
(iv) Reproduction is not an all-inclusive defining characteristic of living organisms.
Only (i)
Both (i) and (ii)
Both (ii) and (iv)
All of these
Which of the following characters given below displays the description of lowest taxonomic category of the organisms of plant and animal kingdom?
It includes one or more than one order.
It is a group containing one or more families.
It is a group of related individuals that resemble one another.
It is a group of organisms that are closely related and share similar characteristics.
The keys are based on contrasting characters generally in a pair called _______.
flora
couplet
both (a) and (b)
manuals
Which of the following statements are correct about herbarium?
It is a store house of collected plant specimens that are dried and preserved on sheets.
Herbarium sheets contain information about date and place of collection, names, family, collectors name, etc.
It serves as quick referral systems in taxonomical studies.
All of the above
Which of the following statement(s) is/are not correct ?
(i) Genus comprises a group of related species which has more characters in common in comparison to species of other genera.
(ii) Three different genera such as Solanum, Datura and Petunia are placed in the family malvaceae.
(iii) In case of plants, classes with a few similar characters are assigned to a higher category called phylum.
Both (i) and (ii)
Only (iii)
Both (ii) and (iii)
All of these
The fungi, the filamentous algae, the protonema of mosses, all easily multiply by _____.
budding
fission
regeneration
fragmentation
Taxa differs from taxon due to being
a higher taxonomic category than taxon.
lower taxonomic category than taxon.
the plural of taxon.
the singular of taxon.