reproduction

Question 1

4 differences between mitosis and meiosis?

Answer 1

mitosis:
everywhere where you need to replace/ repair cells
genetically identical to parent cell
produces 2 daughter cells
parent cell divides once

meiosis:
testes&ovaries
genetically different to parent cell
produces 4 daughter cells
parent cell divides twice

Question 2

differences between insect & wind pollination?

Answer 2

insect pollinated: colourful & anther is not hanging outside
(enclosed anther & stigma)
wind pollinated: feathery & anther is hanging outside
(outside anther & stigma)

Question 3

how does the placenta help the embryo grow?

Answer 3

• embryo’s blood vessels are close to its mothers so it can absorb the nutrients
• allows diffusion as it has a short diffusion distance
• providing a large surface area
• maintain diffusion gradient

Question 4

used of the vagina in sexual reproduction?

Answer 4

It is a muscular tube that leads to the inside of a woman’s body and where a male’s penis will
Enter during sexual intercourse and sperm is deposited.

Question 5

the locations for hormones and the uses?

Answer 5

FSH:
pituitary gland
eggs mature&stimulated oestrogen secretion

LH:
pituitary gland
egg released&stimulates development of corpus luteum

OESTROGEN:
ovaries
repairs / thickens lining of uterus&stimulated LH secretion

PROGESTERONE:
ovaries
maintains the lining of uterus&inhibits LH

Question 6

the order of seed pollination?

Answer 6

pollination is the transfer from anther to stigma

Question 7

3 differences between asexual and sexual reproduction?

Answer 7

asexual need 1 parent cell but sexual needs 2 parents
asexual has no cell fusion involved but sexual has cell fusion involved
asexuals offspring are clones but sexuals offspring are varied

Question 8

TEST: to be able to tell the hormone form line based on menstrual cycles?

Answer 8

???

PROGESTERONE : starts slow and takes a while but eventually goes upwards finishes at top straight line

FSH: starts medium then goes lower before going quickly higher then rounds off and goes back down again finishes below PROGESTERONE

OESTROGEN: starts slow but immediately starts going higher before taking a while to round off and eventually goes back down finishing below FSH where it started from

LH: starts in straight line low down but quickly and steeply shoots upwards before rounding off quickly and shooting back down to previous straight line finish under OESTROGEN

Question 9

MAYBE: term menstruation?

Answer 9

the shredding and breaking down of the uterus lining

Question 10

MAYBE: CORMS meaning

Answer 10

CHANGE
ORGANISM
REPEAT
MEASURE
SAME