NET, IAS, State-SET (KSET, WBSET, MPSET, etc.), GATE, CUET, Olympiads etc.: Botany MCQs (Practice_Test 66 of 104)
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- Which one of the following is endogenously produced?
- Ascospores
- Basidiospores
- Conidiospores
- Teleutospores
- Resin canals in Pinus are formed
- By the separation of secretory cells
- By the destruction of secretory cells
- Partly by separation and partly by destruction of secretary cells
- By large intercellular spaces of the cortex of the stem
- In which one of the following bryophytes does archesporium arise from endothelium?
- Marchantia
- Funaria
- Sphagnum
- Anthoceros
- Assertion (A) : Life cycle of Chlamydomonas is haplobiontic.
- Reason (R) : In the life cycle of Chlamydomonas haploid phase predominates over the diploid phase.
- Both A and R are true and R is the correct explanation of A
- Both A and R are true but R is NOT a correct explanation of A
- A is true but R is false
- A is false but R is true
- Assertion (A) : Virus is an obligate parasite.
- Reason (R) : Virus can multiply only inside living cells.
- Both A and R are true and R is the correct explanation of A
- Both A and R are true but R is NOT a correct explanation of A
- A is true but R is false
- A is false but R is true
- Assertion (A) : Stelar type present in Asteroxylon is actinostele.
- Reason (R) : When central xylem core is star-shaped, it is called actinostele.
- Both A and R are true and R is the correct explanation of A
- Both A and R are true but R is NOT a correct explanation of A
- A is true but R is false
- A is false but R is true
- Assertion (A) : Tagging of genes is more reliable when the genetic distance between the marker and the target gene is small.
- Reason (R) : The probability of a crossover event separating a marker from the locus governing the trait diminishes with the decreasing distance.
- Assertion (A) : Photosynthetic bacteria do not evolve Oxygen during photosynthesis.
- Reason (R) : Photosynthetic bacteria are obligate o facultative anaerobes.
- Both A and R are true and R is the correct explanation of A
- Both A and R are true but R is NOT a correct explanation of A
- A is true but R is false
- A is false but R is true
- Assertion (A) : Protein synthesis is a slow process requiring about a day to form one polypeptide from amino acid.
- Reason (R) : Protein synthesis requires the involvement of several components such as messenger RNA, transfer RNA amino acids, catalytic proteins, cofactors and ribosome՚s.
- Both A and R are true and R is the correct explanation of A
- Both A and R are true but R is NOT a correct explanation of A
- A is true but R is false
- A is false but R is true
- Assertion (A) : Carbon-14 is used in photosynthetic studie.
- Reason (R) : Carbon-14 has a short half life.
- Both A and R are true and R is the correct explanation of A
- Both A and R are true but R is NOT a correct explanation of A
- A is true but R is false
- A is false but R is true
- Assertion (A) : The endogenous level of plant hormones is measured by bioassay technique.
- Reason (R) : The concentration of hormones in plants is so low that it is not possible to chemically estimate the level
- Both A and R are true and R is the correct explanation of A
- Both A and R are true but R is NOT a correct explanation of A
- A is true but R is false
- A is false but R is true
- Assertion (A) : Many dormant seeds can be made to germinate by increasing the partial pressure of oxygen.
- Reason (R) : Under ambient atmospheric conditions the testa of gashard seeds is only sparingly permeable to oxygen
- Both A and R are true and R is the correct explanation of A
- Both A and R are true but R is NOT a correct explanation of A
- A is true but R is false
- A is false but R is true
- Assertion (A) : The saprophytic type of self incompatibility is frequently characterized by reciprocal differences in the compatibility reaction.
- Reason (R) : Saprophytic incompatibility reaction is imparted to the pollen by the plant upon which the pollen is borne
- Both A and R are true and R is the correct explanation of A
- Both A and R are true but R is NOT a correct explanation of A
- A is true but R is false
- A is false but R is true
- Assertion (A) : Claviceps purpurea produces alkaloids of pharmaceutical value when grown naturally but not in artificial media.
- Reason (R) : In artificial media, the photoperiod is limiting.
- Both A and R are true and R is the correct explanation of A
- Both A and R are true but R is NOT a correct explanation of A
- A is true but R is false
- A is false but R is true
- Morph species is
- A phylogenetically-linked biotype
- Morphological features of a species adapted to specific ecological niche
- A floristic unit on which identification of a species may depend
- A fossil species classified on the basis of morphological features