Edexcel IGCSE Biology Section 3a - Reproduction

Question 1

During labour the uterus muscle walls must _______ and the cervix must _______

Accepted Answer

Muscle walls contract and the cervix dilates

Question 2

Which organ has the function of sperm production

Accepted Answer

Testes

Question 3

Warmth, oxygen and water are needed for germination so that:

Accepted Answer

The seed can respire using starch reserves

Question 4

Sexual reproduction results in genetic variation so is useful in

Accepted Answer

A changing environment

Question 5

Which is the correct combination of conditions required for germination

Accepted Answer

Moisture, Oxygen, warmth

Question 6

By which form of cell division does a zygote divide into an embryo?

Accepted Answer

Mitosis

Question 7

Which is a function of the amniotic sac

Accepted Answer

Hold amniotic fluid until the waters break, Prevent entry of pathogens

Question 8

What are the effects of oestrogen and progesterone on ovulation (egg release from the ovaries)?

Accepted Answer

Oestrogen stimulates ovulation; Progesterone inhibits

Question 9

Cereals and beans are nutritious because:

Accepted Answer

Seeds use food stores until the seedling can photosynthesise

Question 10

Cuttings are used to:

Accepted Answer

To produce plants with the same desired characteristics

Question 11

Which is the correct path of an egg towards fertilisation and implantation?

Accepted Answer

Ovary --> Fallopian tube --> Uterus

Question 12

Which is not a function of the amniotic fluid?

Accepted Answer

Provides oxygen and nutrients to the fetus

Question 13

'A rose by any other name would smell as sweet' (Bill Shakespeare). Why?

Accepted Answer

To attract insects

Question 14

Which organ has two functions in males (sperm release and excretion) but only one in females

Accepted Answer

Urethra

Question 15

The ovaries release which two hormones?

Accepted Answer

Oestrogen and Progesterone

Question 16

The male gametes in plants are called X and are carried on the Y

Accepted Answer

X = Pollen, Y = Anther

Question 17

What are the effects of Oestrogen and Progesterone on the uterus lining?

Accepted Answer

Oestrogen builds the lining Progesterone maintains it

Question 18

The fusion of male and female gametes is known as:

Accepted Answer

Fertilisation

Question 19

Primary sexual characteristics:

Accepted Answer

Includes the penis

Question 20

What are the cells of an embryo like in comparison to the zygote

Accepted Answer

Genetically identical

Question 21

To supply water and minerals to new plants, this strawberry plant has:

Accepted Answer

Runners

Question 22

The transfer of pollen from the anther of one plant to the stigma of another by insects is:

Accepted Answer

Neither

Question 23

Which is not a consequence of testosterone release from the testes?

Accepted Answer

Voice gradually deepens

Question 24

Asexual reproduction produces:

Accepted Answer

Clones

Question 25

A wind pollinated flower has:

Accepted Answer

Exposed anthers, Feathery stigma

Question 26

Which is not a consequence of oestrogen secretion from the ovaries?

Accepted Answer

Increased muscle mass

Question 27

Which of these is not an adaptation of the sperm cell?

Accepted Answer

Thin cell wall for fusion with the egg

Question 28

The seed below is carrying out:

Accepted Answer

Germination

Question 29

The placenta has a barrier to:

Accepted Answer

Prevent mixing of blood types

, Prevent pathogens getting from the mother to the fetus

Question 30

Cuttings and runners are both examples of:

Accepted Answer

Asexual reproduction

Question 31

How is this flower pollinated?

Accepted Answer

Wind-pollination

Question 32

The placenta will be adapted to rapid exchange of oxygen and nutrients from mother to fetus by:

Accepted Answer

All of the others, Good blood supply to maintain concentration gradient,

Thin membrane/ diffusion distance

, Large surface area

Question 33

Asexual reproduction uses __ parent(s), and sexual reproduction involves __ parent(s)

Accepted Answer

Asexual = 1, sexual = 2

Edexcel IGCSE Biology Section 3a - Reproduction

Questions 33

Edexcel IGCSE Biology Section 3a - Reproduction

Questions 33