Answer:
The thorns on a rose bush.
The white coat of a snowshoe hare.
The speed of a gazelle.
Explanation:
Defense mechanisms are the adaptations and modifications in a living organism to counterattack or provide a defense in response. Some modification in the plant and the animals helps them to provide a counterattack to save themselves from the attack. The defensive function of the thorns in the roses helps them from being eaten or crushed. Snowshoe hares have furry feet that are large. The white fur helps them to camouflage during winter in the snow and be safe from the predators. Gazelle is an antelope found in South Africa that is able to make long jumps and make sharp turns while running and saving itself from the predators.
Answer:
The correct answer would be non-disjunction.
Down syndrome refers to the genetic disease caused by the non-disjunction of chromosome number 21.
Non-disjunction refers to the event in which the homologous chromosomes or sister chromatids fail to separate properly during a cell division.
In Down syndrome, the sister chromatids of chromosome 21 fail to separate properly which results in the formation of a gamete with 2 copies of chromosome 21.
When this gamete fertilizes with another gamete, it results in the formation of a zygote with 47 chromosomes, that is, 46 chromosomes + extra copy of chromosome 21.
Their digestive systems cannot digest solid foods until that age
