1 markStudents were discussing how to remember the difference between two groups of cells, ‘many, minute and motile’ or ‘few, fat and fixed’.
What group of cells were they referring to?
Male and female gametes
Animal and plant cells
Red and white blood cells
Xylem and phloem cells
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1 markThe statements below are about different hormones in the human body.
Produced by the pancreas.
Causes the voice to deepen at puberty.
Causes an egg to mature in the menstrual cycle.
Promotes the development of stronger muscles.
Which of these statements are correct for testosterone?
1 and 2
2 and 4
3 and 4
4 only
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1 markThere are a number of hormones that control fertility in women.
Which one of these maintains the lining during pregnancy?
Oestrogen
Progesterone
FSH
Testosterone
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1 markThe diagram shows a human sperm cell. The sperm cell has many mitochondria in the mid section.
How do the mitochondria help the sperm carry out its function?
They carry the genetic information from the male parent.
They release energy for movement.
They help the sperm enter the egg.
They make proteins.
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1 markWhich of the following is not an advantage of asexual reproduction?
Population numbers can increase rapidly when conditions are favourable.
Asexual reproduction is very time and energy efficient.
It leads to increased genetic variation within a population.
Asexual reproduction enables organisms to exploit suitable environments fast.
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1 markDuring birth the following processes happen:
Breaking of the amniotic sac
Contraction of the muscles in the uterine wall
Cutting of the umbilical cord
In which order do these processes usually occur?
2 → 3 → 1
2 → 1 → 3
3 → 1 → 2
3 → 2 → 1
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1 markThe diagrams show 3 different species of pollen grains as they appear under a microscope. The diagrams are all to the same scale.
Which pollen grains are involved in insect pollination?
1 and 2
2 and 3
2 only
All of them
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1 markThe table below shows some advantages and disadvantages of sexual and asexual reproduction.
Which row is correct?
| advantages of sexual reproduction | advantage of asexual reproduction |
A | less population growth | only one parent needed |
B | more energy efficient | gametes can be transferred by the environment |
C | no transfer of gametes | does not compete with parent for nutrients |
D | more genetic variation | faster |
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1 markHIV is an STI. The following statements are about changes that could occur in the body.
Reduced antibody production
Reduction in red blood cells
Reduction in white blood cells
Reduced volume of blood plasma
Which of these statements would be correct for HIV?
1 and 2
2 and 4
3 and 4
1 and 3
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1 markThe diagram shows the female reproductive system.
After ejaculation, which pathway will the male gamete take to fuse with the egg?
Vagina → cervix → uterus → oviduct
Ovary → oviduct → uterus → cervix
Vagina → uterus → cervix → oviduct
Ovary → uterus → cervix → vagina
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1 markThe diagram below shows a flower.
Which of these processes have taken place?
| pollination | fertilisation |
A | no | no |
B | no | yes |
C | yes | yes |
D | yes | no |
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1 markAn experiment was set up with four test tubes as shown in the diagram below and placed in the dark.
In which conditions would the seeds germinate first?
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1 markThe diagram shows the menstrual cycle. This is a 28 day cycle.
Which time range in the cycle is the woman most likely to get pregnant?
Days 1 - 4
Days 7 - 10
Days 13 - 16
Days 20 - 23
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1 markGerminating seeds were placed in different temperature and light conditions as shown in the table below.
sample | temperature / °C | light |
1 | 20 | absent |
2 | 20 | present |
3 | 4 | absent |
4 | 4 | present |
A seedling was removed from each experiment after 7 days.
Which seedling was from sample 2?
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1 markThe graphs below show the levels of two hormones involved in the menstrual cycle and the thickness of the uterus lining.
Which of these statements is supported by evidence from the graphs?
Within 5 days of ovulation, the uterus lining gets thinner.
A large increase in progesterone always results in the thickening of the uterus lining.
Each time the oestrogen concentration increases the uterus lining gets thicker.
At ovulation the thickness of the lining is highest.
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