Free Evolution MCQs with Answers

• A. Heterospory
• B. Homospory
• C. Heterogamy
• D. Gamospory

Explanation: Heterospory is the production of two different kinds of spores, usually microspores and megaspores, which form male and female…

• A. It involves alternation of morphologically different generations
• B. Their gametophyte is independent while sporophyte depends upon gametophyte for nutrition.
• C. Both the gametophyte and sporophytes are haploid generations thus can produce haploids gametes to continue the diploid number on fertilization
• D. Spore formation occurs through meiosis

Explanation: In bryophytes, the gametophyte is haploid and the sporophyte is diploid, so they are not both haploid generations.

• A. Antheridia
• B. Archegonia
• C. water
• D. Ovule

Explanation: Bryophyte sperm swim through a film of water to reach the archegonium, where fertilization occurs in the venter containing the egg.

• A. Sphenopeida
• B. Lycopsida
• C. Psilopsida
• D. Pteropsida

Explanation: Horsetails such as Equisetum are placed in Sphenopsida, also spelled Sphenopsida in many older classifications.

• A. Gametophyte is colourless
• B. They have mycorrhizal association
• C. Rhizoids bear Rhizome
• D. Aerial branches have veinless outgrowths

Explanation: Psilopsida have a colourless, often mycorrhizal gametophyte, and their aerial branches carry small veinless outgrowths.

• A. Proterozoic era
• B. Mesozoic era
• C. Paleozoic era
• D. Cenozoic era

Explanation: Mammals became dominant during the Cenozoic Era after the mass extinction at the end of the Mesozoic removed the dominant non-avian…

• A. Spiral and determinate
• B. Radial and indeterminate
• C. Spiral and indeterminate
• D. Radial and determinate

Explanation: When a blastomere can develop into a complete embryo, the cleavage is indeterminate because early cells retain the ability to form the…

• A. Ecosystem
• B. Community
• C. Habitat
• D. Niche

Explanation: Competition is greatest when species occupy the same ecological niche because they require the same resources and perform similar roles in…

• A. Rhizobium and leguminous plants
• B. Marchantia sporophyte and gametophyte
• C. Algae and fungi in a lichen
• D. Mycorrhizal fungi and tree roots

Explanation: The relationship between a Marchantia sporophyte and gametophyte is an alternation-of-generations relationship within one plant life…

• A. 1.5 billion
• B. 2.5 billion
• C. 3.5 billion
• D. 4.5 billion

Explanation: The earliest widely accepted eukaryotic fossils are approximately 1.5 billion years old, although estimates vary with the fossil evidence…

• A. Chordata
• B. Hydra
• C. Echinodermata
• D. Hemichordata

Explanation: Echinoderms have bilaterally symmetrical larvae but develop radial, usually pentaradial, symmetry as adults.

• A. Psilophyton
• B. Rhynia
• C. Cooksonia
• D. Psilotum

Explanation: Psilophyton, Rhynia and Cooksonia are extinct early vascular plants known mainly from fossils, whereas Psilotum is a living whisk-fern…

• A. Monera
• B. Algae
• C. Slime molds
• D. Plants

Explanation: Unicellular green organisms traditionally grouped as green algae are placed in the algae category in this older classification scheme.

• A. Linnaeus
• B. Aristotle
• C. Mendel
• D. Lamarck

Explanation: Linnaeus supported the idea of special creation and believed species were fixed, although his classification system later became useful to…

• A. Recessive allele
• B. Dominant allele
• C. Homozygous dominant individual
• D. Homozygous recessive individual

Explanation: In the Hardy-Weinberg expression p2 + 2pq + q2 = 1, p is the frequency of the dominant allele, so p2 represents individuals carrying two…

• A. Newts
• B. Varanope
• C. Dipnoi
• D. Hagfishes

Explanation: Traditional textbook accounts identify Dipnoi, or lungfishes, as close relatives of the lobe-finned vertebrates from which amphibians…

• A. Observation?hypothesis?law?theory
• B. Observation?hypothesis?deduction?testing of deduction
• C. Hypothesis?observation?deduction?testing of deduction
• D. law?theory?deduction?observation

Explanation: The biological method normally proceeds from observation to a tentative hypothesis, then to deductions or predictions that are tested…

• A. Biodiversity
• B. Phyletic lineage
• C. Connecting link
• D. Evolutionary line

Explanation: A phyletic lineage is an uninterrupted sequence of organisms showing descent from an ancestor through successive descendants.

• A. Living things originated from bacteria
• B. Mycobionts
• C. Non-living things
• D. None of these

Explanation: Abiogenesis is the proposed origin of living organisms from non-living chemical matter, particularly in the early history of Earth.

• A. Animals
• B. Homo sepions
• C. Omnivore
• D. Consumer

Explanation: The scientific name of humans is Homo sapiens, with Homo as the genus and sapiens as the species name.