Intermediate 2 Biology Homework plan 29 th October 21 st Dec 2012

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1 Intermediate 2 Biology Homework plan 29 th October 21 st Dec 2012 All homework answers must be submitted in the homework jotter provided and handed in at the start of the lesson on a Monday Date Learning Outcomes Read MC 5 th Nov 12 th Nov Give the meanings of the words; habitat, population, community and ecosystem State the meanings of the words; producer, primary and secondary consumer, herbivore, carnivore, predator and decomposer. Give an example of each of these from a given food web. State that the arrows in a food web show the direction of energy flow Describe how energy can be lost from a food chain/web. Describe pyramids of energy, numbers and biomass Define the meaning of the words species, niche and adaptation Describe how adaptation to habitat and niche influences the distribution of a species Give pollution and grazing as examples of factors which affect the variety of species in an ecosystem. Describe how human activity has lead to habitat destruction and the biodiversity crisis Describe how populations within a food web could be affected by disruption of the food web Give an example of an animals behavioural adaptation to an environmental stimulus and give it s adaptive significance e.g. woodlice and light/humidity State that plants mainly compete for light and soil nutrients. State that animals compete for food, water and shelter. CH CH Extended response question (5 marks) The pictures below show a food chain which is also represented by two types of pyramid. Name the type of pyramid X. Explain why both pyramids are correct for this food chain. Describe three structural adaptations of desert plants and explain how these adaptations increase their chances of survival. Glossary pg119 chapter 6 pg153 chapter 7 WYSK sentences pg158/ pg158/ Additional homework 1 st Draft Woodlice LO3

2 Date Learning Outcomes Read MC Extended response question (5 marks) The diagram below shows a section through a flower. Glossary WYSK sentences Additional homework 19 th Nov 26 th Nov State that in mammals the gametes are eggs and sperm, in plants they are pollen and eggs Give the sites of gamete production in both animals and plants Describe what occurs during fertilisation State that the formation of a zygote produces variety by combining parental gametes State that chromosomes are a chain of DNA bases that encode information for a sequence of amino acids State that the amino acid sequence dictates the structure and function of proteins State that gametes have 1 set of chromosomes, whilst body cells have 2 sets of chromosomes State that the reduction in chromosome number occurs during gamete formation and that the full set is restored at fertilisation Describe the behaviour of chromosomes during the production of gametes and how this leads to variety in offspring State that in humans, each male gamete has an X or a Y chromosome, while each female gamete has an X chromosome. CH CH 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. The diagram below represents some of the stages of meiosis in the testes. Name cell type A and describe the role of both meiosis and fertilisation in producing offspring pg 174 Chapter 8 pg Final Draft Woodlice LO3 revision for KU test on Monday 26 th Nov

3 Date Learning Outcomes Read MC 3 rd Dec State that a gene is part of a chromosome. Give the meaning of the word allele Give the meanings of the terms heterozygous and homozygous. Give the meanings of the words genotype and phenotype and give examples of similar phenotypes with different genotypes in simple genetic crosses State the meanings of the phrases true-breeding, dominant, recessive, CH Extended response question (5 marks) Describe the differences between the chromosomes in human body cells and human gametes. Explain how these chromosomes are involved in sex determination. Glossary pg198 chapter 9 WYSK sentences pg Additional homework monohybrid cross, P, F1 and F2 Explain why the predicted and observed figures in monohybrid crosses differ. 10 th Dec Describe the effect of environment on phenotype and state that these changes have little evolutionary significance Define the term natural selection CH Describe the process of natural selection as illustrated by the peppered moth Biston betularia. pg213 chapter 10 pg Revision for KU test on Monday 10 th Dec 17 th Dec Describe the advantages and disadvantages of genetic engineering compared to selective breeding Give insulin as an example of a substance produced by genetic engineering CH 6-10 REVISE FOR UNIT 2 NAB on Monday 17 th Dec ALSO REVISE ALL LEARNING OUTCOMES READY FOR YOUR UNIT 2 NAB

4 Multiple Choice Questions Some of the characteristics of five related British plants are shown in the table. Use the information to answer questions 1 and 2. Questions 3 and 4 refer to the following information. The paired statement key below uses the information in the table above. KEY TO FIVE RELATED BRITISH PLANTS Clue 1 Thorns present go to Clue 2 Thorns not present go to Clue 3 Clue 2.Trailing Rose.Dog Rose Clue 3 5 petals present go to Clue 4 4 petals present...tormentil Clue 4.Pear.Silverweed Use the following paired statements to answer questions 1 and 2. A White flowers Yellow flowers B C D White flowers White flowers tinged with pink 4 petals 5 petals White flowers Yellow flowers 1. Which is the correct pair of statements for Clue 2? 3. What percentage of the light energy entering the food chain is converted into plant material? A 0.5% B 1.0% C 1.5% D 2.0% 4. Animals convert 10% of the energy they eat into body material. How many units of energy are passed on to the foxes? A 1 B 5 C 10 D The diversity of species found in a grassland ecosystem will be greatest if A the grassland is regularly sprayed with herbicide B cows are kept on the grassland throughout the year C all the rabbits are removed from the grassland D the grassland is regularly ploughed. 6. Which of the following actions will reduce biodiversity of species in Scottish ecosystems? A Re-introducing the Red Kite to Scotland B Destroying peatland areas by planting trees or burning the peat C Encouraging farming methods that allow young corncrakes to survive D Managing the existing Caledonian pine woods 2. Which is the correct pair of statements for Clue 4?

5 7. Which of the following is the most likely effect of clearing an area of woodland? A The plant species in the area would decrease B The number of small birds would decrease C The field mice population would decrease D The number of deer would increase 11. Two species of flour beetle X and Y are kept in the same container with a supply of food. The numbers of each species of beetles are counted at three day intervals. The beetles competed for the food supply and as a result the population of one species survived but one species did not. Which of the graphs below shows this competion? Questions 8 & 9 refer to the diagram below. The following diagram shows the biomass of four organisms A-D in a food chain. 8. Which organism is the secondary consumer? 9. The biomass is the lowest at the top of the food chain because A the organisms are larger B energy is lost at each level in the food chain C energy is gained from the sun at each level in the chain D the organisms are smaller. 10. A forest is a stable ecosystem. A factor which results in the formation of a stable ecosystem is A reducing the numbers of predators B increasing the number of species present C increasing the producers D a reduction in competition. 12. A species is defined as A a group of organisms that occupy the same habitat B a group of similar looking organisms C a group of organisms that interbreed to produce fertile offspring D a group of organisms that have the same genes.

6 Use the information below to answer question 13. Paramecium is a single-celled organism which can be studied in the laboratory. The graph below shows the growth curve of a Paramecium population in 1000 cm3 of culture solution. In an investigation, a population of Paramecia was cultured together with a population of another single-celled organism (Organism X). The graph below shows changes in both populations over a period of 20 days. Use the information below to answer questions 14 and The period with the greatest increase in the population was A Days 4-6 B Days 6-8 C Days 8-10 D Days The total volume of the culture was 1000 cm3. The greatest population density of Paramecium in the population was A 17 B 180 C 170 D On day 3 the ratio of the numbers of Paramecium present to Organism X is A 200 : 1 B 50 : 1 C 1 : 50 D 1 : 200

7 16. From the table below select the human cell which has the correct number of sets and number of chromosomes. Questions 19 and 20 are based on the diagram below. Questions 17 and 18 refer to the following information. Huntingdon s chorea is a genetic disorder. When one of the chromosomes in a pair carries the abnormal form of the gene, that person develops the disorder. The abnormal form of the gene is represented by H and the normal form of the gene by h. The genotype of an affected individual is Hh. The tree below shows the inheritance of the disorder in one family. 19. Which structure in a plant contains the male gamete? A Stigma B Anther C Filament D Ovule 20. Which structure in a plant combines with the male gamete to form the zygote? A Ovule B Pollen C Ova D Anther 17. Which of the following shows the correct genotypes of Alison, James and Emma? Alison James Emma A Hh Hh hh B hh Hh hh C Hh hh Hh D hh Hh Hh 21. The sequence of the amino acids in a protein is determined by A the hydrogen bonds between each strand of DNA B the sugar molecules present C the phosphate molecules in the DNA molecule D the order of the bases in the DNA molecule. 22. Which of the following statements about the cell divisions that produce gametes are correct? 1. All the cells formed are genetically identical to each other. 2. Each cell formed has a single set of chromosomes. 3. Each cell formed has a double set of chromosomes. 4. The cell division is controlled by the nucleus. 18. Scott and Emma are expecting a baby. What is the chance of the baby inheriting the disorder? A 1 in 3 chance B 1 in 2 chance C 1 in 4 chance D 1 in 1 chance A B C D 1 and 2 are correct 1 and 3 are correct 3 and 4 are correct 2 and 4 are correct

8 23. Which of the following statements about human genetics are correct? 1. A male gamete may have an X chromosome. 2. A male gamete may have a Y chromosome. 3. A female gamete has two X chromosomes. A B C D All statements are correct 1 and 2 only 2 and 3 only 1 and 3 only 24. A cell which carries two different alleles of a gene is A heterozygous B homozygous C dominant D recessive. 25. Which of the following is an example of polygenic inheritance in humans? A Colour blindness B Haemophilia C Height D Tongue rolling 28. Variation in the offspring produced when a male and female gamete fuse is due to A some genes being dominant B some genes being recessive C random combination of the sex cells D both alleles being present. 29. In the fruit fly Drosophila, the allele for normal wings is dominant to the allele for short wings. A normal winged fly was crossed with a short winged fly and all the F1 offspring had normal wings. If these F1 offspring were to mate with each other, what percentage of the F2 offspring would be expected to have normal wings? A 25% B 50% C 75% D 100% 30. Which of the following is not a benefit of selective breeding in crop plants? A Higher yields can be produced. B Undesirable features can be eliminated. C Seed quality can be improved. D Higher yields can always be guaranteed. 26. Which of the following is an example of co-dominant alleles? A Haemophilia B Colour blindness C Eye colour D Blood group 27. The number of melanistic (dark) moths of the Peppered moth has increased in industrial areas until they are greater than the number of the light variety present. The process responsible for this is A mutation B adaptive radiation C natural selection D competition.