Question

Apomixis in plant means development of new plant
A. From root cuttings
B. Without fusion of gametes
C. From fusion of gametes
D. From cuttings of stem

Answer 1

Hint:-In apomixis Apo means away from, and mixed is the act of mixing or mingling. This process is best described as asexual process. It is a powerful tool which fixes heterosis

Complete step-by-step solution:- Apomixis is mode of a sexual reproduction .The development of plants takes place without fusion of gametes. The developed seeds by this process are known as maternal clones. The somatic cells directly forms in to aposporos initial cells which grow from embryo and finally develops in to the seed. The process in which plant bypasses the most important aspects of sexual reproduction meiosis and fertilization to form a viable seeds.In Apomixis plants can form seeds without fertilization and the seed genotype is consistent with the female parent. Easy understanding of apomictic parthenogenesis is, it is one of in which the cell is produced through mitosis It then develops directly to an embryo without prior fertilization. The direct cause of apomixis are thought to be due to physiological factors and hormones. There are three main types of apomixis are : diplospory,apospory and adventitious embryony
In diplospory the embryo sac is derived from the megaspore either directly or by interrupting meiosis or by mitotic division.
Apospory is most common in higher plants. The initiation of the apospory embryo sac can occur simultaneously or it can displace or interrupt sexual embryo sac formation.
Adventitious embryony is a type of sporophytic apomixis in which embryos are produced directly from the nucleus or integument of the ovule.

Correct option: B . Without fusion of gametes

Note:- Apomixis is most common in higher plants such as Gramineae,Rosaceae,Composite,Rutaceae.The other type of crops majorly show apomixis are major cereals, such as maize and wheat