The answer is A as during anaerobic respiration, as there is no oxygen, glucose is converted into ethanol and lactic acid to produce some energy.
On primary succession newly exposed or newly formed rock is colonized by living things for the first time. And in secondary succession an area that was previously occupied by living things
Trisomy 21, as illustrated by the karyotype, is caused by nondisjunction. This occurs when chromosomes do not separate properly during meiosis.
Answer is D) nondisjunction
