0610_w20_qp_31
A paper of Biology, 0610
Questions:
9
Year:
2020
Paper:
3
Variant:
1
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2
is a photograph of a lobster, which is an arthropod. Describe two pieces of evidence visible in that identify this organism as an arthropod. The scientific name of the arthropod in is Homarus americanus. State the genus name. The arthropod shown in is a crustacean. State the names of two other groups of arthropods. Many species of crustaceans live in seas and oceans. Some of these species have become endangered. Describe reasons why some marine crustacean species have become endangered.
1. Characteristics and classification of living organisms  →  1.2. Concept and uses of classification systems
1. Characteristics and classification of living organisms  →  1.1. Characteristics of living organisms
1. Characteristics and classification of living organisms  →  1.3. Features of organisms
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HIV is a pathogen that can cause AIDS. Table 3.1 shows the adult population size of a country and the estimated number of people infected with HIV/AIDS in that country in 2016. Data for six countries are shown. Table 3.1 country adult population size estimated number of adults infected with HIV/AIDS A 808 824 220 000 B 248 490 8 200 C 221 000 D 3 250 000 130 000 E 5 111 111 46 000 F 1 333 333 48 000 State which country in Table 3.1 had the greatest number of adults infected with HIV/AIDS. Calculate the percentage of adults in country B that were infected with HIV/AIDS. Give your answer to one decimal place. % State why antibiotics are not effective against HIV. The sentences describe how pathogens can be transmitted. Complete the sentences using words from the list. Each word may be used once, more than once or not at all. AIDS blood disease food HIV inherited Pathogens for a transmissible may be transmitted through direct contact, for example through or other body fluids. They can also be transmitted indirectly through contaminated surfaces, , animals, or from the air. The human body has several defences against pathogens. These can be mechanical barriers, chemical barriers or responses by cells. The boxes on the left are examples of body defences. The boxes on the right are the different types of defence. Draw one line to link each example to the correct type of defence. Draw four lines. antibody production hairs in the nose phagocytosis stomach acid example chemical mechanical response by cells type of defence The boxes show some examples of diseases. Place ticks (3) in the boxes to show all the diseases that are caused by malnutrition. cholera HIV lung cancer obesity scurvy State three risk factors for coronary heart disease (CHD).
16. Reproduction  →  16.6. Sexually transmitted infections
10. Diseases and immunity  →  10.1. Diseases and immunity
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A scientist investigated how the growth of plant shoots was affected by the direction of light. A light source was placed on one side of a shoot and the scientist recorded the appearance of the shoot after a few days. shows his results. direction of light direction of light shoot at the beginning shoot after a few days Describe the results shown in . State the name of the response to light shown in . Explain the advantage to a plant of the response shown in . Plant roots absorb mineral ions by active transport. Define the term active transport. State the importance of these mineral ions in plants. magnesium ions nitrate ions State two uses of water in plants.
3. Movement into and out of cells  →  3.2. Osmosis
14. Coordination and response  →  14.5. Tropic responses
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Recycling rates in one country were monitored every ten years. The percentages of different types of recycled materials were recorded. shows the results. year Key: paper glass metal plastic percentage recycled Complete the sentences using the data shown in . The general trend shows that between 1970 and 2000 the percentage of materials recycled has . The most commonly recycled material is . In 1970 was not recycled. The percentage of recycled did not change between 2000 and 2010. Calculate the increase in the percentage of glass recycled between 1960 and 1990. %
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Pectinase is an enzyme that is used in the production of apple juice. A student investigated how pH affected the volume of apple juice produced when using pectinase. The student chopped an apple into small pieces. The pieces of apple were put into solutions with different pH values. Pectinase was added to each solution. After two hours the mixture was filtered and the volume of apple juice obtained was recorded. Table 6.1 shows the results. Table 6.1 pH volume of apple juice obtained / cm3 1.0 23.2 2.0 24.2 3.0 23.5 4.0 25.7 5.0 27.6 6.0 27.4 7.0 24.0 8.0 22.0 State the pH at which pectinase is most active. Give a reason for your answer. pH reason State one factor, other than pH, that would affect the activity of pectinase. Pectinase is an enzyme. The box on the left shows the beginning of a sentence. The boxes on the right show some endings of sentences. Draw three lines from the word ‘Enzymes’ to make three correct sentences. are living organisms. are proteins. can only be used once. have a complementary shape to their substrate. increase the rate of chemical reactions. in the stomach are most active at pH 8. Enzymes State one use of enzymes in biotechnology other than fruit juice production. Many types of enzymes are involved in digestion. State the names of two digestive enzymes in the human alimentary canal.
21. Biotechnology and genetic modification  →  21.2. Biotechnology
5. Enzymes  →  5.1. Enzymes
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Pollination occurs when pollen is transferred from one flower to another. is a diagram of part of a flower. A B C D F E State the letter from that identifies the structure which: attracts insect pollinators produces pollen receives the pollen during pollination Draw a label line and the letter X on the flower in to show where fertilisation occurs. State the name of the part labelled E in . The flower shown in represents an insect-pollinated flower. Describe two ways the pollen from an insect-pollinated flower differs from the pollen from a wind-pollinated flower. A student wrote an incorrect statement about fertilisation in plants. Fertilisation is the fusion of zygote nuclei. Circle the incorrect word. Plants can reproduce asexually or sexually. Table 7.1 compares asexual and sexual reproduction. Place ticks (3) in the boxes to show the correct features of asexual and sexual reproduction. Table 7.1 features of reproduction asexual reproduction sexual reproduction involves gametes makes more of the same kind of organism produces genetically identical offspring involves fertilisation
16. Reproduction  →  16.3. Sexual reproduction in plants
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is a Punnett square used to show the inheritance of sex in humans. Complete the Punnett square in . male parent chromosomes X Y female parent chromosomes X Circle the percentage chance of a baby being male. 0 25 50 75 100 State the name of the structure, in a gamete, that contains chromosomes. Sea turtles are reptiles which lay eggs. The sex of the sea turtle offspring is affected by the temperature at which the eggs are kept. Scientists investigated the effect of temperature on the sex of sea turtle offspring. shows the results. temperature / °C percentage of sea turtle offspring that are female State the temperature at which 22% of the sea turtle offspring are female. °C Describe the data shown in .
17. Inheritance  →  17.4. Monohybrid inheritance
17. Inheritance  →  17.1. Chromosomes, genes and proteins
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