Dogs, like all species, carry many different genes on each of their chromosomes. The chromosomes that are inherited by the puppies do not always carry the same set of alleles for these genes as the original matching chromosomes of their parents. This is a result of A. dominant alleles influencing recessive alleles.
B. crossing over during meiosis.
C. The independent assortment of homologous pairs of chromosomes during meiosis.
D. The parent's cells are diploid, but their gametes are haploid.

it is a limiting nutrient limited by a single nutrient in the ecosystem, & the single goes very slow.

answer: andy garner, a 17-year-old who decided to become a human guinea pig in 1965 and go without sleep for 11 days. by the second day his eyes had already stopped focusing, and he lost the ability to identify objects by touch. by day three he was moody and uncoordinated and by the end he had trouble with short term memory and had even started hallucinating.

and a rare genetic mutation called fatal familial insomnia, where people can’t sleep at all, gets progressively worse over months or years and leads to dementia and death.

a devoted soccer fan died after staying awake 48 hours to watch the world cup, she said. ‘while his untimely death was due to a stroke, studies show chronically sleeping fewer than six hours a night increases stroke risk by 4 1/2 times compared with those getting a consistent seven to eight hours.'

*shorten it up as your wish*

(i have divided it into 3 simple paragraphs)