<span>NA contains only elements, so it does not react easily. Many organisms do not contain DNA. Certain mutations in DNA happen at a constant rate. DNA does not change over time, making it a valuable clue.</span>
The right option is d. Perimenopause
Perimenopause is the transition
phase between regular menstrual periods and no periods at all. It takes place
over several years in advance of the menopause. Perimenopause generally starts
for women in their mid-40s and it can start even earlier. Symptoms of Perimenopause include fatigue, breast
tenderness, irregular periods and mood swings.
Answer:
4. haploid half the number of chromosomes
