Answer: B
Explanation: Examples of non-aerobic exercise include weight lifting, running 100 meters, or climbing a flight of stairs. Non-aerobic exercise, also known as anaerobic exercise, includes weight lifting, sprinting, and jumping; any exercise that consists of short exertion, high-intensity movement, is an anaerobic exercise.
Answer: A is not true.
Explanation: b,c, d are all true
Answer:
False
It is false that oils and fats play an essential role in a healthy died and you should eat approximately 12 teaspoons a day. The first part of this sentence is true, oils and fats are indeed important for our bodies as they give us strength and proteins, the other part is incorrect. 12 teaspoons is too much for daily intake, you should take up to 6 teaspoons.
Nondisjunction is defined as the failure of the chromosomes to seperate during cell division. An animal with a haploid number of 6 (diploid number of 12) undergoes meiosis, and at the meiosis II (cells are already haploid from the meiosis I), nondisjunction occurs. The mature ovum will contain 6+1 chromosomes (n+1) because there is an extra chromosome from the nondisjunction. The second polar body will contain 5 chromosomes (normal would be 6) because the second polar body did not receive that extra chromosome due to nondisjunction. In the event of fertilization of the abnormal ovum with a normal sperm, the zygote will be a diploid (12 chromosomes) normally but since the ovum as an extra chromosome from the nondisjunction then the zygote will have an extra chromosome (13 chromosomes). One pair of chromosomes has an extra single chromosome and this is called a trisomy.
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