Answer:
The rate of a reaction is the speed at which a chemical reaction happens. If a reaction has a low rate, that means the molecules combine at a slower speed than a reaction with a high rate.
Meosis results into genetic variability through:
Fertilization, cross-over and independent assortment.
- In Fertilization, the process leds to genetic diversity by allowing each parent to contribute to a specific set of genes to a zygote.This process depends on meiosis to create a haploid gametes where fertilized cells restore a diploid number.
- Crossing over occurs in the prophase stage of the meiosis 1 where a double chromatid homologous pairs of chromosomes exchange chromosome segments as they cross over each other.This makes genes from each parent to mix and result into a different genetic composition.
- Chromatid assortment happens in meosis 11 where sister chromatids separate and move to the daughter cells.The crossover that occursin meosis 1 results to non-identical chromatids in meosis 11 chromosome.
The backlit screens of computers emit enough light to suppress the hormone melatonin. This hormone rises in the evening and orchestrates daily rhythms.
<h3>What is melatonin?</h3>
Melatonin is a hormone whose secretion in the brain is connected to sleep (i.e. the time of day or circadian cycle).
Melatonin is produced by the pineal gland as an environmental response to darkness.
This hormone (melatonin) is well known to be involved in different sleep disorders, thereby having therapeutic applications.
Learn more about melatonin here:
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