Trisomy 21 (nondisjunction) Down syndrome is usually caused by an error in cell division called "nondisjunction." Nondisjunction results in an embryo with three copies of chromosome 21 instead of the usual two. Prior to or at conception, a pair of 21st chromosomes in either the sperm or the egg fails to separate.
Answer:
"Energy flows in one direction, matter recycles."
Explanation:
Matter "returns" to the environment by the deutucators. Energy comes from the sun and is transmitted to higher trophic structures.
Answer: genetic engineering
Explanation
Genetic engineering is the modification of an organism's phenotype by manipulating its genetic material. Some genetic engineering uses the principle of recombination. Recombination is the process through which a new gene is inserted into a bacterial DNA "The plasmid".
One is that the name was coined by French naturalist Pierre Sonnerat who said it was a ‘cry of exclamation and astonishment’, which the locals gave upon seeing the creature. The second is that ‘aye-aye’ is derived from the Malagasy phrase heh heh which means ‘I don’t know’. When the locals were asked what the creature was, they would answer‘heh heh’, either because they really didn’t know what it was or they were afraid to speak its name.