Coleorhiza is a protective sheath covering the radicle in monocotyledonous seeds. Among the options, Paddy (Oryza sativa) is a monocot, while Pea, Tridax, and Bean are dicots. Therefore, Coleorhiza is found in Paddy.
Q2mcq
Match the following : (1) Totipotency (i) Reversion of mature cells into meristem (2) Dedifferentiation (ii) Biochemical and structural changes of cells (3) Explant (iii) Properties of living cells that develops into entire plant (4) Differentiation (iv) Selected plant tissue transferred to culture medium
(1) Totipotency refers to the property of a living cell to develop into an entire plant (iii). (2) Dedifferentiation is the reversion of mature cells into meristematic tissue (i). (3) Explant is the selected plant tissue transferred to a culture medium (iv). (4) Differentiation is the biochemical and structural changes occurring in cells (ii). Matching these results in (1)-(iii), (2)-(i), (3)-(iv), (4)-(ii).
Q3mcq
Which of the following are not regulating services of ecosystem services ? (i)Genetic resources (ii)Recreation and aesthetic values (iii)Invasion resistance (iv)Climatic regulation
a.
(i) and (ii)
Correct Answer
b.
(i) and (iii)
c.
(i) and (iv)
d.
(ii) and (iv)
Step-by-Step AI Explanation
Verified Method
Regulating services include processes like climatic regulation and invasion resistance. Genetic resources are classified as 'Provisioning services', and recreation/aesthetic values are classified as 'Cultural services'. Thus, (i) and (ii) are not regulating services.
Q4mcq
Removal of introns and joining of exons in a defined order during transcription is called :
a.
Inducing
b.
Splicing
Correct Answer
c.
Slicing
d.
Looping
Step-by-Step AI Explanation
Verified Method
Splicing is the post-transcriptional modification process in eukaryotes where non-coding introns are removed and coding exons are joined together to form mature mRNA.
Q5mcq
In majority of the plants, pollen is liberated at :
a.
3 celled stage
b.
1 celled stage
c.
4 celled stage
d.
2 celled stage
Correct Answer
Step-by-Step AI Explanation
Verified Method
In about 60% of angiosperms, the pollen grain is shed at the 2-celled stage, consisting of one vegetative cell and one generative cell.
Q6mcq
Read the following statements and fill up the blanks with correct option. (i)Total water content in soil is called __________. (ii)Water not available to plants is called __________. (iii)Water available to plants is called __________.
a.
Chresard Echard Holard
b.
Holard Echard Chresard
Correct Answer
c.
Holard Chresard Echard
d.
Echard Holard Chresard
Step-by-Step AI Explanation
Verified Method
(i) Holard is the total water content in soil. (ii) Echard is the water unavailable to plants. (iii) Chresard is the water available to plants for absorption.
Q7mcq
Assertion: Turmeric fights various kinds of cancer. Reason : Curcumin is an anti-oxidant present in turmeric.
a.
Both Assertion and Reason are correct
Correct Answer
b.
Assertion is correct, Reason is wrong
c.
Both Assertion and Reason are wrong
d.
Assertion is wrong, Reason is correct
Step-by-Step AI Explanation
Verified Method
Curcumin, a polyphenolic compound found in turmeric (Curcuma longa), is a potent anti-oxidant known for its anti-cancer properties. Both the assertion and the reason are factually correct.
Q8mcq
Which Mendelian idea is depicted by a cross in which the F 1 generation resembles both the parents ?
a.
Inheritance of one gene
b.
Incomplete dominance
c.
Co-dominance
Correct Answer
d.
Law of dominance
Step-by-Step AI Explanation
Verified Method
In co-dominance, both alleles are expressed equally in the heterozygote, so the F1 generation phenotype resembles both parents (e.g., AB blood group in humans). In incomplete dominance, the F1 phenotype is an intermediate mix of both parents, not resembling either one specifically.
Q9mcq
Dwarfing gene of wheat is :
a.
Norin 10
Correct Answer
b.
Pal I
c.
Pelita 2
d.
Atomita I
Step-by-Step AI Explanation
Verified Method
Norin 10 is the famous dwarfing gene source used by Norman Borlaug to develop high-yielding semi-dwarf wheat varieties during the Green Revolution. Pal I, Pelita 2, and Atomita I are not the primary sources of wheat dwarfing genes.
Q10mcq
Dihybrid test cross ratio is :
a.
1 : 2 : 1
b.
9 : 3 : 3 : 1
c.
1 : 1
d.
1 : 1 : 1 : 1
Correct Answer
Step-by-Step AI Explanation
Verified Method
A dihybrid test cross involves crossing an $F_1$ dihybrid with a homozygous recessive individual (e.g., $AaBb \times aabb$). This results in a phenotypic and genotypic ratio of 1:1:1:1.
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