Unit 6: Being a Biologist Homework

Transcription

1 Unit 6: Being a Biologist Homework Homework Date due Parent/Guardian Signature Mark 1 DNA & Chromosomes /10 2- Reproduction in animals /12 3- Fetal development /8 4- Reproduction in plants /12 5- Photosynthesis /14 6- Limiting factors /8 7- Respiration /11 8- Sampling /9 9 - Biodiversity /17 Parental Comments S1/2 CfE Science 0

2 Homework 1 MARK /13 % Comment / Grade Find out more Fill in the blanks a. Chromosomes are found in the of the cell 1 b. Chromosomes contain and are made of 1 2. What is the full name for DNA? 1 3. How many strands does DNA have? 1 4. State what the 4 DNA bases are and write them next to their partner & & 1 5. Genes are the code for what? 1 6. How many chromosomes are in normal human cells? 1 1

3 7. Circle the letter which has the correct statement. The diagram below shows parts of an animal cell. Where is the DNA found in this cell? 1 8. The diagram below shows a yeast cell a. Name the structure in the yeast cell which contains the genetic information 1 b. A molecule consisting of chains of bases is contained in chromosomes Name this molecule 1 2

4 Homework 2 MARK /13 % Comment / Grade Find out more Fill in the blanks a. are required for reproduction b. are the male sex cells c. are the female sex cells 3 2. Where are eggs produced? 1 3. Where does fertilisation take place in humans? 1 4. Where will the fertilised egg grow? 1 5. What do the testes produce? 1 3

5 6. Where does the sperm travel along from the testes and into the penis? 1 7. What is the definition of fertilisation? 1 8. The diagram below represents the female reproductive system. In which of the named structures would the following take place? a. Fertilisation b. Development of the fetus 1 4

6 9. Decide if each of the following statements 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 underlined in the statement Circle the letter which has the correct statement The diagram below shows a stage in the process of reproduction Process W is A B C D Gamete production Reproduction Fertilisation Pollination 1 5

7 Homework 3 MARK /13 % Comment / Grade Find out more Use your summary notes to answer the following questions about the stages of pregnancy a. State in which month of pregnancy that the bones are hardening in the foetus and state the length of the foetus is at this stage. Month Length 1 b. In which month is the embryo officially known as a foetus and what size is the foetus at this stage? Month Size 1 Research task On the next page create a fact sheet for pregnant women detailing 2 vitamins or minerals that they should take to ensure healthy growth of the foetus You must give details of what food these vitamins/minerals can be found and why they are necessary for healthy growth of the foetus Success criteria: in your own words You have stated the names of the 2 vitamins/minerals You have stated what foods they re found in and why they are necessary for healthy growth of the fetus 6 6

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9 Homework 4 MARK /13 % Comment / Grade Find out more What is the male part of the flower called? 1 2. What is the male sex cell in plants? 1 3. What is the female part of the flower called? 1 4. What is the female sex cell in plants? 1 5. What is the definition of fertilisation in plants? 1 8

10 Circle the correct letter which has the correct statement 6. The diagram below shows structures present in a flower Which line in the table identifies part X and the type of gamete it produces? Name of X Type of gamete produced A anther female B anther male C ovary female D ovary male 1 7. The diagram below represents a section through a flower Use the letters from the diagram to identify the following: a. The part containing the female sex cell b. The part containing the male sex cell 1 9

11 8. The diagram below shows the main parts of a flower Which line in the table identifies part X and the type of gamete it produces? Name of X Type of gamete produced A anther female B anther male C ovary female D ovary male 1 9. Which line in the table identifies correctly the male gametes and the site of its production in the flowering plant? Male gamete Type of gamete produced A sperm testes B pollen nucleus anther C sperm anther D pollen nucleus testes 1 10

12 10. a. Name sex organs A and B A B 1 b. Name process X, which involves the fusion of the gametes 1 c. Name cell Y. 1 11

13 Homework 5 MARK /13 % Comment / Grade Find out more Give 2 reasons why plants are vital for life on earth Reason 1 Reason Why are green plants green? 1 3. What is the name of the process by which green plants make their own food? 1 4. What is it in plants that traps the light energy used in photosynthesis? 1 5. Can you remember from first year where in the cell photosynthesis occurs? 1 12

14 6. What 3 things can a plant use glucose for? 1 7. Photosynthesis is the process by which green plants make glucose using energy from the sun. a. Name the by-product A released during photosynthesis 1 b. During photosynthesis, light energy is used Where is light energy trapped in the cell? 1 13

15 8. The sentences below give some information about photosynthesis. Underline one option in each set of brackets to make the sentences correct. { } { } Photosynthesis uses carbon dioxide b to allow fungi to oxygen green plants make their own food Some of this food is converted to { } cellulose starch for making cell walls Name the carbohydrate produced during photosynthesis Name the substance formed by plants to store the carbohydrate produced during photosynthesis 1 14

16 11. An experiment was set up to measure the effect of light intensity on the rate of photosynthesis in the water plant, Elodea. The light intensity was varied using a dimmer switch on the lamp. The rate of photosynthesis was measured by counting the number of bubbles released per minute. a. Name the gas collected 1 b. What raw material needed for photosynthesis is not shown in the diagram? 1 c. Complete the word equation for photosynthesis water + + energy glucose

17 Homework 6 MARK /13 % Comment / Grade Find out more Circle the letters which have the correct statement Which of the following conditions in a greenhouse would produce earlier crops? A B C Glass shading Cool air conditioning Additional oxygen D Additional carbon dioxide 1 2. Other than temperature, state two other limiting factors for photosynthesis. Factor 1 Factor 2 1 The following questions contain graphs obtained from experiments investigating photosynthesis. REMEMBER THE RULES IF IT IS ON THE LINE ON THE WAY UP IT IS WHATEVER IS ON THE X-AXIS. IF IT IS ON THE LINE WHEN IT S LEVELLED OFF IT MUST BE ONE OF THE OTHER 2 LOOK FOR WHAT ONE IS LOWEST! 16

18 3. The graph shows the effect of varying the light intensity, temperature and carbon dioxide on the rate of photosynthesis. The rate of photosynthesis is being limited by A B C temperature at S and light intensity at T light intensity at S and temperature at T carbon dioxide at S and temperature at T D light intensity at S and carbon dioxide at T 1 17

19 4. The graph below show the effects of two different environmental factors on the rate of photosynthesis What are the limiting factors at positions X and Y? X 1 Y 1 5. The graph below shows how light intensity affects the rate of photosynthesis under different conditions 18

20 Use the information from the graph on the previous page to complete the table below. Tick ( ) one box in each row to indicate the factor that is limiting the rate of photosynthesis at points A, B and C Graph point Light intensity CO 2 concentration Temperature A B C 1 6. The following graph shows the effect of increasing carbon dioxide concentration on the rate of photosynthesis at two different temperatures. All other factors were kept constant. From the evidence in the graph, what are the limiting factors at points X and Y? X 1 Y 1 19

21 Homework 7 MARK /13 % Comment / Grade Find out more What is respiration? 1 2. Write the word equation for respiration What must be present for aerobic respiration to occur? 1 4. Oxygen moves into muscle cells for respiration. a. Name one other raw material needed for respiration that enters muscle cells 1 b. Name a waste product of respiration that moves out of muscle cells 1 20

22 5. Decide if each of the following statements 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 underlined in the statement. 6. Circle the letters which have the correct statement

23 7. The following experiment was set up 1 This is a challenge!!! The following questions show a Respirometer. The Respirometer measures the rate of respiration. The germinating peas are using oxygen and producing carbon dioxide. The carbon dioxide produced is absorbed by the chemical at the bottom of the test tube. This means as the peas are using up the oxygen the coloured liquid will be sucked up the tube. The more respiration that occurs the higher the coloured liquid will rise. 22

24 8. The apparatus below was used to investigate gas exchange in germinating peas The movement of the coloured liquid in the capillary tube can be used to measure the volume of A B C oxygen produced by respiration carbon dioxide used up by respiration oxygen used up by respiration D carbon dioxide produced by respiration. 1 23

25 9. The apparatus below was used to investigate gas exchange in germinating peas A suitable control for this experiment would be: 24 ` 1

26 Homework 8 MARK /13 % Comment / Grade Find out more Why is sampling an ecosystem necessary? 1 2. Name 3 Biotic factors. Factor 1 Factor 2 Factor Light is an Abiotic factor which can be measured using a light meter. Name the other 3 Abiotic factors and state how each can be measured. Factor 1 Measured using Factor 2 Measured using Factor 3 Measured using 1 4. How can we sample plants (or slow moving insects)? 1 25

27 5. How can we sample fast moving insects? 1 6. Tree beating can be used to sample small animals living on a tree. What is a possible error of tree beating and state how this problem can be overcome? Possible error Solution 1 7. Abiotic factors can affect the community of seaweeds that grow on a rocky shore Identify two abiotic factors from the list below: Tick ( ) the correct boxes temperature light intensity competition competition grazing limpets 8. What sampling technique could be used to estimate the number of woodlice in an area?

28 9. A quadrat was used to sample four species of plants growing in a field. The abundance of each plant species was measured by counting the number of squares of the quadrat which contained that species. The diagram below shows the species found in one throw of the quadrat. Complete the following table to show the abundance of the four plant species found in the quadrat. One result has been completed for you. Plant species Abundance Daisy 10 Dandelion Plantain Buttercup 1 27

29 Homework 9 MARK /13 % Comment / Grade Find out more What 5 factors affect biodiversity? Factor 1 Factor 2 Factor 3 Factor 4 Factor Where does the greatest biodiversity in the world exist? 1 3. Some features of common seaweeds are shown in the table below 28

30 Use the information in the table on the previous page to complete the key below by correctly writing the correct feature on each dotted line and the correct seaweed names in the empty boxes 3 29

31 4. The key below gives information about some water plants growing in a pond. 1 Plant is fully submerged in water..go to 2 Plant has leaves on or above the surface..go to 3 2 Grows in deep water..elodea Grows in shallow water..starwort 3 Plant has roots in soil..go to 4 Plant is free floating on water surface..water hyacinth 4 Long and thin leaves..water hawthorn Round leaves..go to 5 5 Resistant to frost..water lily Cannot survive frost..lotus a. Use the key to identify the plant from the picture below and its description The plant has its roots in the soil at the bottom of the pond and does not tolerate frost very well. Name of plant 1 b. Which plant grows submerged in deep water? 1 30

32 c. Give three features that the Water lily and the Lotus have in common The key below can be used to identify species of trees from the shape of their leaves 31

33 The diagrams below show one leaf from two different species of tree. a. Use the key on the previous page to identify Leaf A and leaf B Leaf A Leaf B 1 b. Use the key to describe an oak leaf 1 32

34 6. Some features of five varieties of daffodils are shown in the table below a. Use the information in the table to complete the key below by writing the correct feature on each dotted line and the correct names in the empty boxes 2 33

35 b. Give three features of the American Dream daffodils c. Describe one difference between Ice Follies and Barrett Browning daffodils 1 7. The table blow gives information about some common garden flowering plants a. Use the information from the table to complete the key on the next page by writing the correct feature on each dotted line and the correct names in the empty boxes 34

36 1 b. Which feature could be used to distinguish between Snapdragon and Sunflower plants? 1 35