Multicellular Organisms Homework

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1 Multicellular Organisms Homework NAME: CLASS:

2 Reproduction 1. The diagram shows the parts of a flower. 1a. Name part X (1) 1b. Name the sites of production of both male and female gametes in a flowering plant. Female (1) Male (1) 2. Describe pollination. (1) 3. Describe the difference between self-pollination and cross-pollination. (2) 1

3 4. Describe the process of fertilisation in humans. (1) 5. In humans which of the following are not normally formed? (circle your answer) A A sperm cell with a Y chromosome B An egg cell with a Y chromosome C An egg cell with an X chromosome D A sperm cell with an X chromosome (1) 6. Give the meaning of the following terms: Haploid (1) Diploid (1) 7. Explain why body cells are diploid and gametes are haploid. (2) Total /12 Next Steps: 2

4 Propagation and Growing Plants 1. Which of the following is NOT a method of natural vegetative propagation? (please circle or underline your answer) A. plantlets B. offsets C. cuttings D. runners (1) 2. Name 1 method of artificial propagation that gardeners might use? (1) Describe how to carry out this method. (1) 3. The steps for taking stem cuttings are shown below. 1. Remove the lower leaves. 2. Place the cuttings into compost. 3. Cut the stem below the node. 4. Cover the pot with a polythene bag. 5. Dip the cut end into the rooting powder. Which of the following shows the correct sequence of steps? A B C D (1) 4. Name one plant which is used in medicine and describe what it is used for? (1) Total /5 Next Steps: 3

5 Growth and Development of Different Organisms. 1. Name 3 essential requirements for seeds to germinate. (2) 2. Complete the table below: Chemical Name Nitrogen Potassium Nutrient Chemical Symbol P Importance of Nutrient to plant Promotes root growth (3) 3. What effects will smoking cigarettes have on the developing embryo and why? (2) 4. Your friend s doctor has told them they are suffering from anaemia. What mineral is your friend deficient in and what foods would you recommend they eat in order to correct this? Mineral (1) Foods (1) 5. Calcium is an essential mineral in your diet. Which symptoms might you have if you are deficient in calcium? A. Scurvey B. Weak bones and teeth C. Rickets D. Anaemia (1) Total: /10 Next Steps: 4

6 Nervous Control 1. (a) Different parts of the brain have different functions. Draw a line to link each part of the brain with its correct function. (2) Part of the brain Cerebrum Medulla Cerebellum Hypothalamus Function Regulation of temperature Control of breathing rate Conscious responses Co-ordination of movement (b) (i) The flow chart below shows the structures in a reflex arc. Complete the chart by inserting the names of the missing neurones. (3) Receptor e.g heat receptor in skin Neurone 1 Neurone 2 Neurone 3 Effector e.g muscle 5

7 (ii) Describe a function of a reflex response 2. (a) The diagram below shows a section through the brain. Add the two missing labels. (2) (1) (b) The Central Nervous System is made up of the brain and which other structure? 3. What type of response to a stimulus does not need to be learned and does not involve conscious thought? (1) 4. What is a synapse? (1) 5. How do electrical impulses transfer across the synapse? (1) Total: /12 Next steps: 6 (1)

8 Hormonal Control 1. Circle the correct option within the brackets. Insulin is a hormone released from the (liver / pancreas). Insulin causes excess glucose to be stored in the (liver / pancreas) as (glucagon / glycogen). (Glucagon / Glycogen) is a hormone that causes (glycogen / glucagon) to be released as glucose in response to a decrease in blood glucose concentration. (5) 2. Describe the causes and symptoms of diabetes. 3. Where, in general, are hormones released from? (3) (1) 4. How are hormones carried around the body to their target organs? (1) 5. Explain why a hormone only works on cells of its target organ. (2) Total /12 Next Steps: 7

Transport in Plants Homework 1. The diagram below shows two types of structures found in plants. (a) Which letter shows the phloem? (1) (b) What is the function of the phloem?

9 Transport in Plants Homework 1. The diagram below shows two types of structures found in plants. (a) Which letter shows the phloem? (1) (b) What is the function of the phloem? (1) (c) The xylem helps to support a plant. State one other function of the xylem. 2. Describe the process of transpiration from the root hair to the atmosphere (3) (1) Total /6 8

10 The Circulatory System Homework 1. The heart is formed from four chambers. The upper chambers are the left atrium and the right atrium. The wall of the right atrium has an average thickness of 2mm. the left atrium wall is on average 3mm thick. The lower chamber on the left side, the left ventricle has walls on average 18mm thick, compared to 4.5mm in the right ventricle. (a) Use this information to complete the following table. PS-Selecting (2) Heart Chamber Average wall thickness (mm) 18 (b) Express the ratio of the average wall thickness of the right ventricle to that of the left ventricle as a simple whole number ratio. PS- Processing (1) Right Ventricle : Left Ventricle (c) Provide an explanation for the left ventricle having a greater thickness than the right ventricle. 9 (2)

11 2. What is the function of valves in the circulatory system? (1) 3. Complete the table below. (3) Arteries Capillaries Veins Thick walls No No Presence of valves No Role within the body Transport blood back to the heart. 4. Name the blood vessel which provides the heart with its own blood supply. (1) 10

12 Total /10 The Respiratory System Homework 1. Circle the collect option in each set of brackets. (3) Air entering the lungs passes down the (bronchioles / trachea) to the bronchi. To collect oxygen, blood enters the lungs through the pulmonary (artery / vein) and returns to the (left / right) atrium of the heart. 2. The diagram below shows an alveolus in the lungs. State two features of the alveolus that allows efficient gas exchange. (2) Feature 1 Feature 2 11

13 Total /5 The Digestive System Homework 1. The diagram shown below shows a villus. Name the two substances which are absorbed into the lacteal. (2) Substance 1 Substance 2 2. (i) Complete the table below. (2) Substrate Enzyme Product Starch Maltose 12

14 Pepsin Fat Fatty acids and glycerol (ii) Name the components of gastric juice. One has been completed for you. (2) 1 Hydrochloric acid Describe the function of the acid in the stomach. (2) 4. The diagram below shoes the human digestive system. 13

15 Name the digestive enzymes produced by P and Q. (2) P Q 5. Describe how the action of peristalsis moves food through the small intestine. (2) 14

16 6. Give two features of the small intestine which increases the rate of absorption (2) Which line in the table identifies correctly the functions of the large intestine and the anus? (1) Large Intestine Anus A Digests food material eliminates undigested material B Stores undigested material Digests food material C Absorbs water from undigested material eliminates undigested material D Absorbs digested food products Digests food material Total /15 Genetics And Variation Homework 1. Which line in the table correctly shows the number of chromosomes in a red blood cell and a sperm cell in humans? (1) Red Blood Cell Sperm Cell A B

17 C D The following table shows four blood groups and their frequency in a population. Blood Group Frequency in population (%) O 44 A 42 B 10 AB 4 (a) Calculate the simplest whole number ratio of the frequency of blood groups O to AB. (1) : Blood Group O AB (b) Name the type of variation shown by these blood groups (1) 3. Feather colour in parrots is controlled by a single gene. Blue feather colour (B) is dominant to yellow feather colour (b). (a) A homozygous blue parrot is crossed with a homozygous yellow parrot. (i) Complete the genotypes of the P generation. (1) P phenotype blue x yellow P genotyoe 16

18 (ii) State the genotype and phenotype of the F1 parrots. (2) Genotype Phenotype (b) An F1 individual is crossed with a true breeding yellow parrot. Complete the punnet square to show the expected results of this cross. (2) Genotype of gametes from F1 parents Genotype of gametes from yellow parents 17

19 Total /10 18

National Know that stem cells in animals are cells which can divide.

National Know that stem cells in animals are cells which can divide. National 5 Biology Multicellular Organisms Unit Success Criteria Success Criteria Multicellular Organisms National 5 Colour the box at the side of each objective: RED I don t know much about this or am