OSHWAL ACADEMY NAIROBI JUNIOR HIGH NAME: CLASS: SUBJECT TEACHER: BIOLOGY YEAR 7 MID TERM MAY 2021 Time: 1 HOUR Instructions Use blue or black ball-point pen. Answers written in pencil WILL NOT be marked. Fill in the boxes at the top of this page with your name, class and the subject teacher’s name. Answer all questions in the spaces provided. Information The total mark for this paper is 50 The marks for each question are shown in brackets - use this as a guide as to how much time to spend on each question. There may be more space provided than you require. Check to see you have 14 questions on 9 printed pages and no blank page. Use of calculators is allowed Advice Read each question carefully before you start to answer it. Keep an eye on the time. Try to answer every question. Check your answers if you have time at the end. Total: 50 Marks 1 1. The images below show examples of two plants growing in a desert environment. Explain three adaptations that desert plants have that allow them to survive in this extreme environment. [6] ……………………………………………………………………………………………………………………………………………… ……………………………………………………………………………………………………………………………………………… ……………………………………………………………………………………………………………………………………………… ……………………………………………………………………………………………………………………………………………… ……………………………………………………………………………………………………………………………………………… ……………………………………………………………………………………………………………………………………………… ……………………………………………………………………………………………………………………………………………… …………………………………………………………………………………………………………………………………………….. 2 2. Animals are adapted to survive in their environment. The desert rat lives in hot, sandy conditions [3] 3. Animals such as the desert rat compete with each other to survive. State anything that animals compete for. [1] …………………………………………………………………………………………………………………………………………… …………………………………………………………………………………………………………………………………………… …………………………………………………………………………………………………………………………………………… …………………………………………………………………………………………………………………………………………… 3 4. The diagram below shows a food web. Use it to answer the questions that follows. I. Using the food web shown above, answer the following questions. [4] a) Name a producer: ………………………………………………………………………………………………………………………………… b) Name a herbivore: ………………………………………………………………………………………………………………………………… c) Name a carnivore: ………………………………………………………………………………………………………………………………… II. What is a consumer? ………………………………………………………………………………………………………………………………… III. Draw a food chain that has 4 stages. [1] ………………………………………………………………………………………………………………………………… 4 IV. What would happen to the number of grasshoppers if the number of mice decreased? [2] ……………………………………………………………………………………………………………………………………… ……………………………………………………………………………………………………………………………………… ……………………………………………………………………………………………………………………………………… V. What would happen to the number of the rabbits and foxes if a disease killed a lot of carrots? [2] …………………………………………………………………………………………………………………………………………… …………………………………………………………………………………………………………………………………………… …………………………………………………………………………………………………………………………………………… 5. Polar bears live in the Arctic, where the temperature can drop as low as -50⁰C during winter months. Describe two ways that polar bears are adapted to survive in cold climates. [2] …………………………………………………………………………………………………………………………………………… …………………………………………………………………………………………………………………………………………… …………………………………………………………………………………………………………………………………………… 5 6. The drawings below show dogs from two different breeds. From the pictures above, give two ways in which the dogs are different. [2] …………………………………………………………………………………………………………………………………………… …..……………………………………………………………………………………………………………………………………… ………..………………………………………………………………………………………………………………………………… …………..……………………………………………………………………………………………………………………………… …………………..……………………………………………………………………………………………………………………… …………………………………………………………………………………………………………………………………………. 7. Place a tick in the correct box to show whether the characteristic is inherited or caused by environmental factors. [7] 6 8. Place a tick in the correct column to show whether the animal is a predator or prey. [5] 9. The list below shows the number of goals scored during the Women’s FIFA World Cup 2015 by each team: Australia (5), Brazil (4), Cameroon (9), Canada (4), China (4), Colombia (4), Costa Rica (3), Ecuador (1), England (10), France (10), Germany (20), Ivory Coast (3), Japan (11), Mexico (2), Netherlands (3), New Zealand (2), Nigeria (3), Norway (9), South Korea (4), Spain (2), Sweden (5), Switzerland (11), Thailand (3), USA (14). 10. We can display the data about the number of goals scored in a frequency table as follows: Number of Goals Scored Tally Total 0–3 4–7 8 – 11 12 – 15 16 – 19 20 - 23 [6] 7 11. Which group was the most common(mode)? ………………………………………………………………. 12. [1] The pictogram below shows the favourite sports of pupils from a Year 7 class. Draw a bar chart showing this information. 13. 8 [4] 14. A student counted number of petals on ten daisy flowers. These were the results. 18,21,19,20,20,17,19,18,17, 20 Calculate the: a) Mean number of petals [2] b) What is the Median of the petals [1] c) What is the Mode [1] 9