National 5 Biology
Multicellular Organisms
Homework
d) Reproduction
Holy Cross High School
Page 1
Homework 1 (10 marks)
1. The Diploid number of chromosomes in a cell from a kangaroo is 12. Which line in the table below
identifies the number of chromosomes for the cell type shown?
(1)
2. Which line in the table below identifies correctly the male gametes and the site of its production
in a flowering plant?
(1)
3. The diagram below shows structures present in a flower.
Which line in the table identifies part X and the type of gamete it produces?
Holy Cross High School
(1)
Page 2
4. Copy and complete the table to give the site of production and number of chromosomes of each
type of gamete.
Human Gamete
(2)
Site of Production
Number of Chromosomes
Egg
Sperm
5. The average production of sperm cells by a bull throughout the year is shown in the table below.
a) Describe the pattern of sperm production over one year.
(2)
b) From the results, suggest one environmental factor which affects sperm cell production.
(1)
c) In May, bulls produce a daily average of 8cm3 of fluid containing sperm cells. How many
sperm cells would be contained in 1cm3 of this fluid?
(1)
6. The diagrams below show animal gametes (not drawn to scale). Name each of the structures
indicated.
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(1)
Page 3
Homework 2 (15 marks)
1. The diagram below shows the main parts of a flower.
Which line in the table identifies X and the type of gamete it produces?
(1)
2. Name the male gametes and their site of production in a flower.
Male Gametes _____________________
Site of production __________________
(2)
3. The grid below contains the names of structures in the reproductive system of mammals.
Use the letters from the grid to identify the structure:
a) Where fertilisation occurs?
(1)
b) Produces egg cells?
(1)
Holy Cross High School
Page 4
4. The diagram below shows parts of the human female and male reproductive systems.
Use the letters from the diagram to answer the questions below:
a) Where are sperm cells produced?
(1)
b) Where does fertilisation of an egg cell take place?
(1)
c) Where are egg cells produced?
(1)
d) Which structure deposits sperm?
(1)
5. The diagram represents an insect-pollinated flower.
a) Copy and complete the following table to show the letter, name and function of parts A,
B and C.
b) Give a brief description of insect pollination.
Holy Cross High School
(2)
(2)
Page 5
6. The diagram below represents a wind pollinated flower.
Use the names from the diagram to identify the parts of the flower described below.
a) Produces pollen?
(1)
b) Produces ovules?
(1)
Holy Cross High School
Page 6
Homework 3 (9 marks)
1. The diagram below shows a stage in the process of reproduction.
a) Name Process W.
(1)
b) What name is given to cell R?
(1)
2. Which of the following diagrams represents the process of fertilisation in plants?
Holy Cross High School
(1)
Page 7
3. The flow chart below shows a summary of events that occur during reproduction in a flowering
plant.
a) (i) Name sex organs A and B.
(1)
(ii) Name Process X, which involves the fusion of the gametes.
(1)
(iii) Name cell Y.
(1)
b) Copy and complete the table below by inserting ticks (√) into the correct boxes to show which of
the cells in the diagram are haploid and which are diploid.
Cell
Haploid
(2)
Diploid
Ovule
Pollen
Cell Y
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Page 8
4) Select one option from each set of brackets to make the following sentences correct.
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(1)
Page 9
Homework 4 (9 marks)
1) The diagram below shows a section through a flower.
Name the sites of production of pollen grains and ovules in a flower. Describe how these gametes are
formed and describe the process of fertilisation.
(5)
2) The following table lists the length of gestation (pregnancy) for several mammals.
a) By how many days is the gestation period of a horse longer than that of a chimpanzee? (1)
b) Which mammal’s length of pregnancy is 29 times longer than that of a mouse?
(1)
c) By how many times longer is the gestation period of an elephant longer than that of a
human?
(1)
d) Which animal’s length of pregnancy is shorter than that of a horse by 6.5 times?
Holy Cross High School
Page 10
(1)