Which one of the following operations with fl | vedclass

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(D) Variation in offspring is primarily caused by genetic recombination during sexual reproduction. $1$. Self-pollination leads to homozygosity and re

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Cross-pollination between two hybrids

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(D) Variation in offspring is primarily caused by genetic recombination during sexual reproduction. $1$. Self-pollination leads to homozygosity and reduces variation. $2$. Cross-pollination between a pureline and a hybrid results in limited genetic diversity. $3$. Cross-pollination between two hybrids involves the segregation and independent assortment of multiple heterozygous alleles,leading to a high degree of genetic recombination and phenotypic variation in the progeny. $4$. Cross-pollination between different species (interspecific hybridization) is often difficult due to reproductive isolation and frequently results in sterile offspring,making it less effective for producing viable,varied populations compared to intraspecific hybridization between two hybrids.

Which one of the following operations with flowering plants would be most likely to produce the greatest number of variations in the offspring?

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Identify the odd one out.

Arrange the following terms in the correct developmental sequence: Pollen grain, sporogenous tissue, microspore tetrad, pollen mother cell, male gametes.

$A$: More than one pollen tube can enter an embryo sac.
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Which of the following organisms reproduces only once in its lifetime?

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