BIO 101 | Study Mode

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Question 1
A
de Candolle
B
Linnaeus
C
Theophrastus
D
Darwin.
Explanation
Linnaeus, 1758 developed Binomial system of nomenclature, de Candolle gave the term taxonomy. Theophrastus, father of botany, gave names and descriptions of 480 plants in his book. Histuria plantarum and Darwin proposed the theory of natural selection or origin of species.

Correct option: C
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Question 2
A
Bentham and Hooker
B
Linnaeus
C
Julian Huxley
D
A.P. de Candolle.
Explanation
The term New Systematics was given by Julian Huxley (1940). This classification takes into account the cytological, morphological, genetical, anatomical, palynological and physiological characters.

Correct option: C
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Question 3
A
artificial
B
natural J U.
C
phylogenetic
D
numerical.
Explanation
Classification given by Bentham and Hooker is Natural System. Monocots were placed after dicots; closely related families were seperated; gymnosperms were placed between dicots and monocots.

Correct option: B
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Question 4
A
sarcodina
B
zoofiagellata
C
ciliata
D
sporozoa.
Explanation

On the basis of locomotory organelles the protozoan protists are divided into four groups : Mastigophora, Sarcodina, Sporozoa and Ciliata. Trypanosoma belongs to class zooflagellata which comes under the group mastigophora. The characteristics are:

(i) These zooflagellates are generally uninucleate, occasionally multinucleate.

(ii) The body is covered by a firm pellicle.

(iii) Nutrition is holozoic, parasitic and saprobic.

(iv) Reserved food is glycogen.


Correct option: B
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Question 5
A
Trypanosoma cruzi
B
T. rhodesiense
C
T. tangela
D
T. gambiense.
Explanation

Trypanosoma gambiense was first observed by Forde in 1901. It causes African sleeping sickness. The disease, also called trypanosomiasis, is found in western and central parts of Africa. The parasite is transmitted by blood sucking tse-tse fly, Glossina palpalis. Mouth and contractile vacuole are absent. Food is absorbed through the body surface.

The parasite multiplies by fission. In human beings the parasite lives in the blood plasma. It causes trypanosoma fever. It is accompanied by glandular swelling. Later the parasite enters cerebrospinal fluid and damages the brain. It makes the patient lethargic and unconscious. Because of it, the disease is called sleeping sickness. If untreated, the disease leads to death.


Correct option: D
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Question 6
A
Leishmania donovani
B
Trypanosoma gambiense
C
Entamoeba histolytica
D
Plasmodium vivax.
Explanation
The main vertebrate host is human. The principle invertebrates hosts are tsetse fly of the genus Glossina. T. gambiense is transmitted to human by biting of an infected tsetse fly after the cyclic development of the parasite.

Correct option: B
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Question 7
A
Linnaeus
B
De Candolle
C
Pliny the Edkr
D
Bentham and Hooker
Explanation
Artificial system of classification was first used by Linnaeus. The cryptogams were included in flowering plants. Linnaeus system is known as sexual system of classification. He classified on the basis of number, size and union of sex organs.

Correct option: A
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Question 8
A
natural system
B
artificial system
C
phylogenetic system
D
asexual system
Explanation
Linnaeus put forward an Artificial system of plant classification which was based on sexual characters like cryptogamia, monoecia, monandria, diandria, polyandria etc. It is commonly also called as sexual system of plant classification.

Correct option: B
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Question 9
A
merozoite
B
sporozoite
C
trophozoite
D
minuta form.
Explanation
The infective stage of Plasmodium is a minute organism called sporozoite. When the mosquito bites man, sporozoites present in the salivary gland of female Anopheles mosquito are injected into the blood of the man. These sporozoites are spindle-shaped or sickle- shaped uninucleate organisms capable of wrigging (wormlike) movements. Each sporozoite consists of elastic pellicle, cytoplasm and nucleus.

Correct option: B
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Question 10
A
micronucleus
B
macronucleus
C
both micronucleus and macronucleus
D
mitochondria.
Explanation
Paramaecium contains a single large macronucleus and one small micronucleus. The macronucleus controls metabolism such as feeding and maintaenance, whereas the macronucleus takes and important role in reproduction and stores genetic information, hence it is also termed as reproductive nucleus whereas macronucleus is termed as vegetative nucleus.

Correct option: A

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