During sexual reproduction, traits from both parents of an organism combine to form a new set of traits. For a given set of selection pressures in the surroundings of a population, the combinations of genes dictate whether the organism has favorable or non-favorable traits. Thus, natural selection is dependent on reproduction.
Explanation:
Xenopus laevis is allotetraploid: it has 2 sets of homologous chromosomes originally from one species and 2 sets of homologous chromosomes originally from another species, making a total of 4 sets of chromosomes. During meiosis, every chromosome has another homologous one with which it can pair, producing viable gametes that have the complete genetic information of the species.
Mules, however, are allodiploid: they have one set of chromosomes from a donkey and another set from a horse, making a total of 2 sets of chromosmes. But those two sets are not homologous, so during meiosis the chromosomes can't pair and the gametes will have errors that make them inviable, making mules sterile
Hydrophytes is the answer to your question
First blank space is endocrine system and the second blank is hormones
