HOMEWORK BOOKLET
BROXBURN ACADMEY
NAT 5 – Homework Questions – Key Areas
Cells, tissues and organs
1. Describe a structural feature possessed by some white blood cells
that enables them to destroy bacteria.
1
2. State the function of the two blood cells and explain how these
cells are suited to their function.
4
2. Name the cells which line the inner surface of the trachea and
describe how their shape is related to their function.
4
4. State two functions of the xylem tissue and describe how the
Shape is suited to its function.
4
5. Name the two areas of a leaf cell capable of photosynthesis.
2
NAT 5 – Homework Questions – Key Areas
Stem Cells
Stem cells from an embryo can be grown in special solutions.
Some facts about stem cells are given below:
Stem cells from an embryo can grow into any type of tissue
Stem cells may grow out of control to form cancers
Large numbers of stem cells can be grown in the laboratory
Stem cells may be used in medical research or to treat some human
diseases
o Patients treated with stem cells need to take drugs for the rest of their
life to prevent rejection
o Collecting and growing stem cells is expensive
o
o
o
o
Use the information above to answer the questions.
1)
2)
Give two advantages of using stem cells
Give two disadvantages of using stem cells
(4 Marks)
Meristems
Name the four stages from a newly formed plant cell to it becoming a
specialised cell.
(2 marks)
Explain the difference between apical and lateral meristems.
(2 marks)
Explain why some annual rings are thick and some thin.
(2 marks)
NAT 5 – Homework Questions – Key Areas
Communication
1. The diagram below shows the structure of the human brain.
(a) Label A-D in the brain above.
4
(b) Write down the function of A-D in the brain above.
4
2. The flow chart below show the structures of the reflex arc. Complete the
chart by inserting the names of the missing neurones.
2
3 (a) Describe a function of the reflex response.
(b) Name the type of impulse which carries messages along a
neurone.
(c) Where does a synapse occur?
(D) What is carried between synapses?
1
1
1
1
4. The diagram below shows parts of the central nervous system (CNS) and
a nerve to the heart.
(a) Name the two parts in the diagram which make up the central nervous
system.
1
(b) What is the function of nerve cells in the central nervous system?
1
Skills
1. At the start of the investigation, the blood glucose and insulin concentration
Of a health adult human were measured and found to be normal. The
individual immediately drank a glucose drink and his blood glucose and
insulin levels were re-measured at intervals over a period of 5 hours with food
or drink intake.
The results are shown in the table below.
(a) Calculate the simplest whole number ratio of blood glucose
concentration at the start o the maximum level recorded.
1
(b) Calculate how long it took for the blood insulin level to return to
the start level from its maximum concentration.
1
(c)
(d)
Give two reasons to account for the decrease in blood glucose
concentration between 1 and 3 hours.
2
Predict how the individuals blood glucagons concentration will change
after 5 hours assuming no further intake of food or drink.
1
NAT 5 – Homework Questions – Key Areas
Reproduction
1. The diagram below represents a wind-pollinated flower.
a) Explain how each of the labelled structures contributes to wind
pollination.
(2)
b) What essential stage in plant reproduction must take place after
pollination and before fertilisation?
(1)
2. Explain what is meant by the terms diploid and haploid.
(2)
3. Give an example of a haploid cell and a diploid cell.
(2)
4. What sex chromosomes are present in a male human.
(1)
5. Name 4 different gametes and, for each, state the site of
production.
(4)
6. State the location of fertilisation in a human.
(1)
7. Describe the differences between internal and external
fertilisation.
(2)
Skills
1. The diagrams below show two types of flower.
a) What diagram shows an insect pollinated plant?
b) Wind pollinated flowers produce larger quantities of pollen than
those pollinated by insects. Explain why this is necessary.
c) The table shows when some wind pollinated species start to
produce pollen.
Pollen production then continues for an average of five weeks.
From the information given, why is May likely to be a particularly
difficult month for people with pollen allergies.
2. The table below refers to egg production in the UK.
(1)
(1)
(1)
a) Use the information from the table to complete the pie chart.
(Trace the blank chart into your jotter then complete it)
(2)
b) The total number of eggs laid per year in the UK is 30 million.
How many of these are laid by free-range hens?
c) Modern varieties of hens can lay up to 300 eggs per year. Their
ancestral wild varieties laid about 20 eggs per year.
Calculate this increase in egg production as a percentage.
(1)
(1)
3. The chart below shows the peak times for airborne pollen from
six wind-pollinated plants.
b) How many months are shown to be free of pollen?
c) The above plants account for most pollen allergy in Britain.
Most allergy sufferers are affected for 3– 4 months each year.
Give a conclusion which can be drawn about pollen allergy from
these facts.
c) In summer, air carries an average of 100 pollen grains per litre.
If a person inhales 12.6 litres of air per minute, calculate the
total number of pollen grains inhaled each hour.
(1)
(1)
(1)
NAT 5 – Homework Questions – Key Areas
Inheritance
1. How would we know for sure if two animals who look similar are
actually of the same species?
(1)
2. Define discrete and continuous variation
3. State whether the following are examples of continuous or
discrete variation:
-
Tongue rolling
Hair Colour
Height
Weight
Ear lobes attached or unattached
Length of feet
(2)
(3)
4. What do genes contain the information for?
(1)
5. What word refers to the form of a gene?
(1)
6. If B represents blonde hair and b represents red hair, describe
the genotype and phenotype of an individual with:
a) BB
b) Bb
c) bb
(3)
7. State another name for a family tree
(1)
8. Name two genetic disorders that can be tracked through a
family using a family tree.
(2)
Total = 14
Skills
1. In guinea pigs brown hair (B) is dominant to white hair (b). Carry out a
monohybrid cross to show the F1 genotypes of a homozygous brown haired
guinea pig crossed with that of a white haired guinea pig. Show the
genotypes of each of the four offspring.
(2)
2. Cross two of the F1 individuals from the above cross to show the genotypes
of the F2 generation. State the phenotypic ratio of the F2 generation.
(2)
3. Huntingtons disease is a condition caused by a dominant allele in a gene.
Make a copy of the family tree shown below and state clearly the genotype
of each individual within it.
(3)
4. a) Albinism is a condition caused by a recessive version of a gene. Using the
letter A to represent genotypes; show the cross between a sufferer of the
condition and a carrier of the condition. Show clearly the genotypes of each
of the possible children.
(2)
b) What is the percentage chance of a child from this cross suffering from
albinism?
(1)
c) How many of the four children could pass on the recessive gene?
(1)
Total – 11 marks
NAT 5 – Homework Questions – Key Areas
The need for transport
1. The diagram shows an alveolus in the lungs.
a) State two features of the alveolus that allow efficient gas
exchange
(2)
b) Oxygen diffuses into muscle cells for respiration. Name one
other raw material needed for respiration that enters by diffusion.
(1)
c) Name a waste product of respiration that diffuses out of muscle cells. (1)
d) State the function of mucus and cilia in the airways.
(2)
2. The diagram below shows human blood as seen through a microscope.
a) Name A, B and C.
b) What is the function of red blood cells?
c) Name the pigment found in red blood cells.
(3)
(1)
(1)
3. The diagram below shows a section through the human heart.
a) Label A-H in the heart diagram.
(8)
b) Decide if each of the following statements about blood vessels is True or
False, and tick (✓) the appropriate box.
If the statement is False, write the correct word in the Correction box to
replace the word(s) underlined in the statement.
(3)
c) Give the functions of an artery, capillary and vein.
d) Name the artery which supplies the heart with food and oxygen.
(3)
(1)
4. The diagram below shows a plant structure used for transportation of
material.
a) Name the above structure and give its function in a
plant.
(2)
5. The diagram below represents part of a cross section of a leaf.
a)
b)
c)
d)
Label A-F.
Give the function of A-F.
Name two substances which are transported in xylem vessels.
Draw and label a xylem vessel.
(6)
(6)
(1)
(1)
6. The experiment below is used to investigate the transpiration rate in a plant.
a) What is meant by the term transpiration?
(1)
b) Describe how the experiment can be used to measure transpiration rate.
(2)
c) Name the structure in a leaf where water is lost during transpiration. (1)
d) What controls the opening and closing of the structure mentioned in c?(1)
e) Name the structure which allows plants to absorb water from the soil. (1)
7. The diagram below represents a structure found in the small intestine. The
arrows show the direction of the flow of fluids through the structure.
a) What is the name of this structure?
(1)
b) Which letter identifies the position of the fluid with the greatest glucose
content after the absorption of food?
(1)
c) Which letter identifies the position of the fluid with the greatest fat content
after the absorption of food?
(1)
d) Give three ways in which this structure is suited to its function.
(3)
e) What is meant by the term peristalsis?
(1)