biology MCQs – Page 42

Practise multiple-choice questions from biology for competitive examinations and subject revision. Review each marked answer and report any item that may be outdated or unclear.

biology Mcqs
821. Van neil hypothesis about the production of oxygen during phosynthesis was based on the study and investigations on___________?
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A. Protenema

B. Bacteria

C. Cyanobacteria

D. Algae

822. The percentage of light absorbed by the leaf is ___________?
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A. 10%

B. 1%

C. 20%

D. 15%

823. Co-ordination in man is brought about by___________?
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A. Nervous system

B. Endocrine system

C. Both of these

D. none of these.

824. Antheridiophore and archegoniophore are found in_____________?
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A. Marchantia

B. Funaria

C. Both of these

D. None of these

825. Bryophtes are called amphiabians of plant world because:
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A. All of these

B. Amphibians have close relation with bryophytes in their habitat.

C. Bryophytes like amphibian live in damp shady places and close to water body.

D. Bryophytes like amphibian ancestors are one of the most primitive organisms in this world.

826. Which of the following group of tracheophyta has expanded or scale like leaves which are alwaysed arranges in whorls?
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A. Sphenopsida

B. Psilopsida

C. Prteropsida

D. Lycopsida

827. Stomata cover only ______________ of leaf surface?
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A. 1-2 %

B. 10%

C. 50%

D. 0.03 0.04%

828. Which one of the following forms the blk of exoskeleton of an arthropod?
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A. Epicuticle

B. Ectocuticle

C. Procuticle

D. None of these

829. All of the following are similarities between nervous and endocrine system except:_____________?
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A. Homestatic in function

B. Release chemical messengers in extracellular space

C. Produce chemical messengers

D. Having slow but prolonged effects
830. Which of the following is used in brewing industry to promote malting_______________?
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A. Abscisic Acid

B. Auxins

C. Gibberellins

D. Cytokinins

831. The dichotomously branching system has shape similar to________________?
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A. R

B. Y

C. U

D. Fork

832. Complete breakdown of glucose molecule takes place in which of the following?
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A. Aerobic respiration

B. Lactic acid fermentation

C. Alcoholic fermentation

D. All of these

833. In which group of tracheophytes ovules are born on the exposed surface of megasporophylls______________?
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A. Spheospsida

B. Filicineae

C. Angiosperms

D. Gymnosperms
834. ____________ is simplest form of learning.
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A. Insight learning

B. Latent learning

C. Habituation

D. Imprinting

835. Which of the following statement is incorrect about Molluscans?
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A. They have hydrostatic skeleton.

B. They move by tube feet

C. Their shell grows as the animal grows.

D. They are surrounded by single or double pieces of hard skeleton.

836. Mosses are included in sub-division of ___________?
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A. Anthoceropsida

B. Hepaticopsida

C. Lycopsida

D. Bryopsida
837. ___________ respiration is directly involved in the production of energy, necessary for all living activities?
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A. Organismic

B. Cellular

C. Both of these

D. None of these

838. Which of the following has no central nervous system?
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A. Man

B. Hydra

C. Planaria

D. Cockroach

839. Which one of the following is avascular structure?
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A. A spongy bone.

B. Cartilage

C. All of these

D. A compact bone.

840. Light reaction takes place on/in____________?
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A. Chloroplast

B. Storma

C. Thylakoid

D. Grana