A further set of Botany practice questions dealing with plant anatomy, physiology, reproduction, genetics and classification. Work through them for extra revision practice after covering the basics, and use the answers to confirm your understanding of plant processes and terms.
A test cross does not always result in a 3:1 ratio; it depends on whether the unknown genotype is homozygous or heterozygous. This follows from NCERT principle where the relation explains the outcome clearly for students in simple steps.
Ref: NCERT Biology Textbook for Class XI and XII (Botany section), Chapter: Biology - Botany portion covering relevant concept.
Bacteria are prokaryotic organisms and lack a well-defined nucleus. This follows from NCERT principle where the relation explains the outcome clearly for students in simple steps.
Ref: NCERT Biology Textbook for Class XI and XII (Botany section), Chapter: Morphology and Anatomy of Flowering Plants, Topic: Plant structure and tissue systems.
Most orchids rely on entomophily, where insects act as pollinators, due to their specialized floral structures and scent. This follows from NCERT principle where the relation explains the outcome clearly for students in simple steps.
Ref: NCERT Biology Textbook for Class XI and XII (Botany section), Chapter: Sexual Reproduction in Flowering Plants, Topic: Pollination, fertilization and seed formation.
Auxins and cytokinins synergistically promote ll division and enlargement, especially in tissue culture. This follows from NCERT principle where the relation explains the outcome clearly for students in simple steps.
Ref: NCERT Biology Textbook for Class XI and XII (Botany section), Chapter: Morphology and Anatomy of Flowering Plants, Topic: Plant structure and tissue systems.
Hibiscus exhibits axile placentation, not marginal placentation. Marginal placentation is found in pea. This follows from NCERT principle where the relation explains the outcome clearly for students in simple steps.
Ref: NCERT Biology Textbook for Class XI and XII (Botany section), Chapter: Morphology and Anatomy of Flowering Plants, Topic: Plant structure and tissue systems.
Crossing over during meiosis leads to genetic recombination and variation among offspring. This follows from NCERT principle where the relation explains the outcome clearly for students in simple steps.
Ref: NCERT Biology Textbook for Class XI and XII (Botany section), Chapter: Morphology and Anatomy of Flowering Plants, Topic: Plant structure and tissue systems.
The dominant phase in bryophytes is the gametophyte, not the sporophyte, which is dependent on it. This follows from NCERT principle where the relation explains the outcome clearly for students in simple steps.
Ref: NCERT Biology Textbook for Class XI and XII (Botany section), Chapter: Plant Kingdom, Topic: Classification and salient features of plant groups.
The ntrosome, containing ntrioles, is involved in organizing spindle fibers during ll division in animal lls. This follows from NCERT principle where the relation explains the outcome clearly for students in simple steps.
Ref: NCERT Biology Textbook for Class XI and XII (Botany section), Chapter: Morphology and Anatomy of Flowering Plants, Topic: Plant structure and tissue systems.
Homologous chromosome pairing occurs only in meiosis during prophase I, leading to genetic recombination. This follows from NCERT principle where the relation explains the outcome clearly for students in simple steps.
Ref: NCERT Biology Textbook for Class XI and XII (Botany section), Chapter: Morphology and Anatomy of Flowering Plants, Topic: Plant structure and tissue systems.
Cymose inflorescence has a basipetal arrangement, where older flowers are at the top and younger ones at the base. This follows from NCERT principle where the relation explains the outcome clearly for students in simple steps.
Ref: NCERT Biology Textbook for Class XI and XII (Botany section), Chapter: Morphology and Anatomy of Flowering Plants, Topic: Plant structure and tissue systems.
DNA polymerase has proofreading ability to correct errors during DNA replication. This follows from NCERT principle where the relation explains the outcome clearly for students in simple steps.
Ref: NCERT Biology Textbook for Class XI and XII (Botany section), Chapter: Morphology and Anatomy of Flowering Plants, Topic: Plant structure and tissue systems.
Sickle-ll anemia is caused by a mutation in the β-globin gene, resulting in deformed red blood lls. This follows from NCERT principle where the relation explains the outcome clearly for students in simple steps.
Ref: NCERT Biology Textbook for Class XI and XII (Botany section), Chapter: Morphology and Anatomy of Flowering Plants, Topic: Plant structure and tissue systems.
