Reproduction Flashcards
1
Q
Advantages of sexual reproduction
A
- Variation
- Selective breading
2
Q
Advantages of asexual reproduction
A
- Only one parent needed
- Use less energy
3
Q
What is a zygote
A
male and female gametes produce
4
Q
How do seeds and fruits reproduce?
A
- Pollen grains are male gamete in plants
- Ovule is the female gamete
male nucleus travels down the pollen tube from the pollen grain to fuse with female egg in the ovule forming zygote.
5
Q
Germination
A
process in which seed begin to develop in new young plant
6
Q
Best processes for germination
A
Water: need to active enzymes to break down starch
Oxygen: need for aerobic respiration
Warmth: optimum temp for enzymes will increase
7
Q
Male reproductive system
A
- Sex glands: produce semen
- Sperm duct: sperm passes
- Testis: contain scrotum + sperm
- Penis: urine and semen out
- urethra: ring of muscle stops urine + semen mixing
8
Q
Female reproductive system
A
- Ovaries: develop when FSH is released
- Oviduct: connects ovary to uterus
- Uterus: has thick lining
- Cervix: muscle lower end of uterus to allow foetus remain inside
- Vagina: muscular that leads inside body
9
Q
Why do women need oestrogen?
A
- Breast development
- Menstrual cycle begins
- Growth body hair
- Widening hips
10
Q
Why do males need testosterone?
A
- growth of penis and testes
- production of sperm
- growth of facial and body hair
- lower and voice breaking
11
Q
Menstrual cycle
A
28 days egg is released on day 14
12
Q
Oestrogen
A
- thickening of uterus in preparation for implant of egg.
13
Q
Progestestrone
A
- maintain thick lining of uterus.
- inhibits LH and FSH
14
Q
FSH and LH
A
- FSH causes maturation off egg
- LH stimulates the release of egg during ovulation.
15
Q
When does ovulation occur?
A
when LH and FSH levels peak
