Answer:
Option (a).
Explanation:
Homozygotes individuals has the same genotype whereas the genotype of the heterozygotes are different. The homozygotes may refer the true or pure organism.
The gametes obatined from the homozygotes caaries the same gene. The gametes of the heterozygotes carries the different version of the gene. The dominant trait will express themselves in the heterozygotic condition.
Thus, the correct answer is option (a).
The pituitary gland and hypothalamus are fully capable of synthesizing and releasing GnRH, LH, and FSH, but this does not occur until the onset of puberty. Therefore, the "no answer text provided" is the correct alternative for this question.
<span>A sperm cell has half of the chromosomes than other animal cells I think</span>
Answer: B. Water breaks down into oxygen molecules for respiration.
Water is the required for photosynthesis, a process by which plants (terrestrial and aquatic) makes their food by utilizing water as a reactant to produce oxygen and glucose as product. The glucose act as a source of energy for conducting various metabolic processes in plants but oxygen is released in the air.

This oxygen is necessary for terrestrial and aquatic animals for respiration. Therefore, water breaks down into oxygen by the process of photosynthesis, hence water plays important role in respiration in living beings.