Master NEET Zoology with topic-wise questions. Tailored for NEET students, these questions strengthen your Biology preparation.
Which of the following is NOT a characteristic typically associated with organisms that predominantly reproduce asexually?
Rapid population growth in stable environments
Adaptation to narrow ecological niches
High genetic diversity within populations
Reduced energy expenditure on mate finding
In a plant species that reproduces through apomixis, a mutation arises in a somatic cell that confers resistance to a fungal pathogen. What is the likelihood that this resistance trait will be passed on to the offspring?
Low, as somatic mutations are rarely heritable.
High, as apomixis bypasses meiosis and fertilization.
Dependent on whether the mutation is dominant or recessive.
Zero, as apomixis only involves the maternal gametophyte.
Which of the following combinations of reproductive strategies is LEAST likely to be observed in a single organism?
Binary fission and budding
Fragmentation and regeneration
Fragmentation and parthenogenesis
Budding and gemmule formation
A researcher observes a unicellular organism reproducing asexually. The daughter cells are genetically identical except for a few minor variations. Which mechanism is MOST likely responsible for these variations?
Crossing over during mitosis
Independent assortment of chromosomes
Random mutations during DNA replication
Conjugation with another individual
Certain plants can reproduce both sexually and asexually. Under which of the following environmental conditions would asexual reproduction be MOST advantageous?
Unstable environment with frequent disturbances
Environment with high pathogen pressure
Environment with limited resources and high competition
Stable environment with abundant resources
In a hypothetical plant species, the endosperm is diploid and the embryo is triploid. Which of the following most accurately describes the process leading to this unusual ploidy?
Diploid megaspore mother cell undergoes mitosis to form the embryo sac, and a diploid male gamete fuses with a haploid central cell.
Haploid megaspore mother cell undergoes meiosis to form the embryo sac, and a diploid male gamete fuses with a diploid central cell.
Triploid megaspore mother cell undergoes mitosis to form the embryo sac, and a haploid male gamete fuses with a diploid central cell.
Diploid megaspore mother cell undergoes meiosis to form the embryo sac, and two haploid male gametes fuse with a haploid central cell.
In a species with a 2n=16 karyotype, how many chromosomes would be present in the nucleus of the functional megaspore?
8
16
32
4
The process of parthenogenesis involves the development of an organism from an unfertilized egg. Which statement is TRUE regarding the genetic makeup of an organism produced through parthenogenesis?
It is genetically identical to the mother, except for any mutations that may have occurred.
It inherits half its chromosomes from the mother and half from the father.
It is genetically distinct from both the mother and the father.
It inherits all its chromosomes from the father.
Which of the following is NOT a characteristic of asexual reproduction?
Produces genetically identical offspring
Involves the fusion of gametes
Can occur through methods like budding and fragmentation
Generally faster than sexual reproduction
