EVOLUTION
SOURCES OF VARIATION IN A POPULATION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The population increases
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The relative frequencies change
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The population decreases
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The animals die
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Detailed explanation-1: -There are several ways to detect ovulation, including urine test kits to measure LH levels, transvaginal ultrasound, endometrial biopsy, blood tests to measure hormone levels, and the basal body temperature (BBT) chart.
Detailed explanation-2: -In an average 28-day menstrual cycle, ovulation typically occurs about 14 days before the start of the next menstrual period. However, each person’s cycle length may be different, and the time between ovulation and the start of the next menstrual period may vary.
Detailed explanation-3: -This is true even for women whose cycles are usually 28 days long. Among the 69 cycles for 28 days in our study, ovulation occurred 14 days before the next menses in only 10%. Time from ovulation to next menses ranged from 7 to 19 days (days 10 to 22 of the menstrual cycle).
Detailed explanation-4: -Ovulation can sometimes be associated with bloating, tender breasts, and a slight increase in your basal body temperature. Not everyone experiences these changes, though. Ovulation occurs when hormonal changes signal your ovaries to release a mature egg.