Reproduction

Question 1

What is Sexual reproduction?

Answer 1

It involves the fusion of male and female gametes. The offspring will get a mix of both genes.

Question 2

What is ASexual Reproduction?

Answer 2

It takes place with only 1 parent, it does not involve gametes. No genetic variation. All offspring are identical clones. Mitosis. Either mitosis or binary fission is used.

Question 3

What are gametes?

Answer 3

Gametes are sex cells. They are like sperm and egg cells. or pollen and eggs. They only have half the genetic material of a normal cell, 23 chromosomes.

Question 4

What is an advantage of Asexual reproduction?

Answer 4

Only 1 parent is needed
Parents are very quick.

Question 5

What is an advantage of Sexual reproduction?

Answer 5

Genetic Variation
Some individual may be less prone to diseases
Population can adapt to changing conditions
Evolution)

Question 6

How does sexual reproduction occur?

Answer 6

The sperm ducts carry sperm from the tests to the urethra. The sperms contain semen that helps carry the sperm into the female reproductive system. The female gametes are released from the ovaries from ovulation. During the menstrual cycle, ovulation occurs. The egg goes down the fallopian tube and goes to the uterus (womb). Semen is ejected into the vagina. In the sperm reaches the egg. Fertilization will occur.

Question 7

What happens in fertilization?

Answer 7

Cells will continue to divide to form strucutres in the embryo and placentas. After fertilization is gestation for 32 =48 weeks.

Question 8

What is the placenta?

Answer 8

the placenta is an organ where the exchange of nutrients and air between the mother and the embryo occurs. they pass from the mom’s blood to the embryo’s blood thru the placenta. Using blood vessels in the umbilical cord. After 8 weeks, the embryo is known as a fetus, it has all organs.

Question 9

What is the menstrual cycle?

Answer 9

Women between the age of 12 and 50 years old undergo a monthly cycle in which their uterus prepares for pregnancy. the menstrual cycle occurs for 28 days.

Question 10

What is menstruation?

Answer 10

The first stage of the menstrual cycle. it occurs if the egg has not to be fertilized. Known as a period. Happens between 3-7 days. Blood is lost through the vaginal canal.

Question 11

What is ovulation?

Answer 11

The second stage is where the woman is most fertile. The uterus thickens again, a follicle develops in the ovary. An egg is released 14 days into the cycle. This is when fertilization could take place. If the egg is fertilized. the lining does not occur and the women is pregnant.

Question 12

What 2 hormones control the menstrual cycle?

Answer 12

Oestrogen and Progesterone.

Question 13

What are Oestrogen and Progesterone used for?

Answer 13

Oestrogen is produced in the ovary and it causes the uterus lining the thicken after men’s saturation. Levels are high in the middle of pregnancy.
Progesterone is produced by the empty follicle in the ovary. It is dropped off the if the gg is unfertilized. Progesterone levels are highest in the second half of pregnancy.

Question 14

How may plants species are known to science?

Answer 14

390,000

Question 15

What are the sexual reproductive organs in plants?

Answer 15

Pollen and Ovaries

Question 16

What are 2 ways pollination can occur?

Answer 16

Pollination can occur from wind and water and from pollinators such as bees.

Question 17

What the differences between pollination by pollinators and by wind and water?

Answer 17

Wind And Water
Smaller Petal
Dull Colored Petals
Small and smooth

Pollinators
Large petal
Bright colors
Large and rouh

Question 18

How does fertilization occur?

Answer 18

The pollen grains land on the female stigma. The pollen gain goes down the pollen tube to the ovary through the micropyle. The male sex cells travel to the ovule. They both fuse and the egg is fertilized. The other male sex cell attaches to two cells in the embryo cells forming an endosperm. This provides starchy food for the seed. The ovary becomes a fruit with seeds inside.

Question 18

How does fertilization occur?

Answer 18

The pollen grains land on the female stigma. The pollen gain goes down the pollen tube to the ovary through the micropyle. The male sex cells travel to the ovule. They both fuse and the egg is fertilized. The other male sex cell attaches to two cells in the embryo cells forming an endosperm. This provides starchy food for the seed. The ovary becomes a fruit with seeds inside.