Peanuts

THE MIRACLE OF LIFE WORKSHEET - ANSWER KEY

Directions: Watch the video and then answer the questions.

Introduction:

1. How old is the earth? 4.5 BILLION YEARS

2. Where on Earth did life first begin? OCEANS

3a. How many chromosomes in each human body cell/somatic cell? 46

b. How many chromosomes in a human sex cell (sperm or egg) 23

4. What is the genetic material in the nucleus of a cell called? DNA

The Female Reproductive System:

1. How many egg cells in the human ovary? 1/4 MILLION IN EACH

2. How many chromosomes in the human egg cell? 23

3. When the follicle ruptures and the egg cell is released, what is this process called? OVULATION

4. Where does the egg go after ovulation? INTO THE FALLOPIAN TUBE/OVIDUCT

5. How small a human egg cell? SIZE OF A GRAIN OF SAND

6. Once it is in the fallopian tube, what moves the egg down toward the uterus?

CILIA & MUSCLE CONTRACTIONS

7. How wide is the fallopian tube/oviduct? TWICE AS THICK AS A HUMAN HAIR

8. How long does it take the egg to travel 5 inches down the fallopian tube?

3 – 4 DAYS TO MOVE 5 INCHES

9. How long will the egg live in the fallopian tube after ovulation? 24 HOURS

10. What happens to the egg if it is not fertilized? DISINTEGRATES

11. Name the 2 female sex hormones. ESTROGEN PROGESTERONE

12. Name the male sex hormone. TESTOSTERONE

13. When can we tell whether the fetus is male or female? 7 WEEKS AFTER CONCEPTION

14. How many people presently live on this planet? (1991) 4 BILLION [3/12/12 - 7 BILLION]

15. How many millions of people are born each year? 128 MILLION (1991)

The Male Reproductive System:

1. Where are sperm formed? TESTES

2. What is the function of the Cowper’s gland? PRODUCES LUBRICATING FLUID;SEMINAL FLUID

3. What is the function of the prostate? SECRETES ALKALIN/BASIC FLUID TO PROTECT SPERM

4. What do the seminal vesicles produce? FRUCTOSE SUGAR...