NEET (UG) Botany Previous Year Questions

Find the statement that is NOT correct with regard to the structure of a monocot stem.

Which one of the following is the characteristic feature of gymnosperms?

Sweet potato and potato represent a certain type of evolution. Select the correct combination of terms to explain the evolution.

Which of the following is an example of a zygomorphic flower?

Silencing of specific mRNA is possible via RNAi because of -

Genes $R$ and $Y$ follow independent assortment. If $RRYY$ produce round yellow seeds and $rryy$ produce wrinkled green seeds, what will be the phenotypic ratio of the $F_2$ generation?

Read the following statements on plant growth and development.
A. Parthenocarpy can be induced by auxins.
B. Plant growth regulators can be involved in promotion as well as inhibition of growth.
C. Dedifferentiation is a pre-requisite for re-differentiation.
D. Abscisic acid is a plant growth promoter.
E. Apical dominance promotes the growth of lateral buds.
Choose the option with all correct statements.

Which of the following microbes is NOT involved in the preparation of household products?
A. Aspergillus niger
B. Lactobacillus
C. Trichoderma polysporum
D. Saccharomyces cerevisiae
E. Propionibacterium sharmanii
Choose the correct answer from the options given below:

Given below are two statements: One is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A): Cells of the tapetum possess dense cytoplasm and generally have more than one nucleus.
Reason (R): Presence of more than one nucleus in the tapetum increases the efficiency of nourishing the developing microspore mother cells.
In light of the above statements, choose the most appropriate answer from the options given below:

Match List I with List II:
List I
A. Scutellum
B. Non-albuminous seed
C. Epiblast
D. Perisperm
List II
I. Persistent nucellus
II. Cotyledon of Monocot seed
III. Groundnut
IV. Rudimentary cotyledon
Choose the option with all correct matches.

Which of the following statements about RuBisCO is true?

Histones are enriched with -

How many meiotic and mitotic divisions need to occur for the development of a mature female gametophyte from the megaspore mother cell in an angiosperm plant?

Given below are two statements:
Statement I: Fig fruit is a non-vegetarian fruit as it has enclosed fig wasps in it.
Statement II: Fig wasp and fig tree exhibit mutual relationship as fig wasp completes its life cycle in fig fruit and fig fruit gets pollinated by fig wasp.
In the light of the above statements, choose the most appropriate answer:

Which of the following is the unit of productivity of an ecosystem?

Given below are two statements:
Statement I: The DNA fragments extracted from gel electrophoresis can be used in construction of recombinant DNA.
Statement II: Smaller size DNA fragments are observed near anode while larger fragments are found near the wells in an agarose gel.
In the light of the above statements, choose the most appropriate answer from the options given below:

Given below are two statements:
Statement I: In ecosystem, there is unidirectional flow of energy of sun from producers to consumers.
Statement II: Ecosystems are exempted from 2nd law of thermodynamics.
In the light of the above statements, choose the most appropriate answer from the options given below:

The blue and white selectable markers differentiate recombinant colonies from non-recombinant colonies on the basis of their ability to produce colour in the presence of a chromogenic substrate.
Statement I: The blue coloured colonies have DNA insert in the plasmid and they are identified as recombinant colonies.
Statement II: The colonies without blue colour have DNA insert in the plasmid and are identified as recombinant colonies.
In the light of the above statements, choose the most appropriate answer:

Match List I with List II. Choose the option with all correct matches.
List I: A. Pteridophyte, B. Bryophyte, C. Angiosperm, D. Gymnosperm
List II: I. Salvia, II. Ginkgo, III. Polytrichum, IV. Salvinia

In bryophytes, the gemmae help in which one of the following?