The correct answer is option C) "are processed by proteases into both opiate and non-opioid peptides".
Explanation:
The opioid propeptides, as well as any other propeptides, is a protein precursor that needs to be excised into a smaller form to acquire its active form. The opioid propeptides are processed by proteases into both opiate and non-opioid peptides, where the latter could be active or non active. Opiate peptides are enkephalins, endorphins, and dynorphins that act by blocking secondary systems, such as the ones that cause pain perception.
Organism needs time to reach adulthood and to reproduce.
Requires the contribution of two parents.
Asexual Reproduction:
Creates genetically identical offspring.
Organism doesn't have to waste energy to find a mate.
Requires the contribution of a single parent.
Explanation:
Sexual Reproduction:
Sexual reproduction involves the fusion of a male and female gamete. A gamete is a haploid cell that contains half of the chromosomes as in the parent cell. This process is called fertilization and it results in the formation of a zygote, a diploid cell that develops into an embryo and ultimately an individual.
Sexual reproduction involves two parents, each of which contributes one set of chromosomes (23) to the offspring.
Asexual Reproduction:
Asexual reproduction produces an exact copy of one single parent. Offspring produced through asexual reproduction do not possess genetic variation.
Asexual reproduction occurs through four processes:
Plants absorb nitrates in water through their roots. Nitrates are present in high levels in plant fertilisers. Without nitrates, the amount of chlorophyll in leaves reduces. ... This reduces the plant's ability to photosynthesise and grow properly, which reduces the farmers' crop yield .
