IGCSE Biology Specification

Edexcel 4BI1

Section 3: (a) Reproduction

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#3.1

understand the differences between sexual and asexual reproduction

#3.2

understand that fertilisation involves the fusion of a male and female gamete to produce a zygote that undergoes cell division and develops into an embryo

#3.3

describe the structures of an insect-pollinated and a wind-pollinated flower and explain how each is adapted for pollination

#3.4

understand that the growth of the pollen tube followed by fertilisation leads to seed and fruit formation

#3.5

practical: investigate the conditions needed for seed germination

#3.6

understand how germinating seeds utilise food reserves until the seedling can carry out photosynthesis

#3.7

understand that plants can reproduce asexually by natural methods (illustrated by runners) and by artificial methods (illustrated by cuttings)

#3.8

understand how the structure of the male and female reproductive systems are adapted for their functions in humans

#3.9

understand the roles of oestrogen and progesterone in the menstrual cycle

#3.10B

understand the roles of FSH and LH in the menstrual cycle

#3.11

describe the role of the placenta in the nutrition of the developing embryo

#3.12

understand how the developing embryo is protected by amniotic fluid

#3.13

understand the roles of oestrogen and testosterone in the development of secondary sexual characteristics