Reproduction Marking Scheme This is the marking scheme for quiz: B16 - Reproduction Quiz Topic Guide: B16 - Reproduction Total: 32 marks Q1 [1 mark] Answer: B. Two gamete nuclei fuse to form a diploid zygote. Q2 [1 mark] Answer: B. Transfer of pollen from anther to stigma. Q3 [1 mark] Answer: A. Water, oxygen, and a suitable temperature. Q4 [1 mark] Answer: B. LH. Q5 [1 mark] Answer: C. HIV is an STI-causing virus that may lead to AIDS. ...
Reproduction Quiz Instructions: Answer all questions. Total: 32 marks. Multiple-choice questions Q1 [1 mark] Which statement correctly describes sexual reproduction? A. One parent produces genetically identical offspring without gamete fusion. B. Two gamete nuclei fuse to form a diploid zygote. C. A diploid cell divides to produce genetically identical offspring. D. Pollen is transferred from anther to stigma. Q2 [1 mark] What is pollination? A. Fusion of a pollen nucleus with an ovule nucleus B. Transfer of pollen from anther to stigma C. Growth of a pollen tube through the ovary D. Development of a zygote into an embryo ...
Biological molecules Biological molecules are substances made by living organisms. Carbohydrates, fats and oils, and proteins contain different elements and are built from smaller molecules. Food tests identify some of these molecules in a sample. Elements and building blocks Molecule Elements Smaller molecules or units Carbohydrates Carbon, hydrogen, oxygen Starch, glycogen, and cellulose are made from glucose molecules. Fats and oils Carbon, hydrogen, oxygen Made from fatty acids and glycerol. Proteins Carbon, hydrogen, oxygen, nitrogen; sometimes sulfur Made from amino acids. A large molecule made from many repeating smaller units is often called a polymer. The smaller units are monomers. This terminology is useful, but remember the exact syllabus relationships above. ...
Quiz: Coordination and Response Question 1 Define the term ‘reflex action’. [2] Question 2 The diagram below shows a simple reflex arc. Identify the role of the effector in this process. [1] Explain why reflex actions are important for survival. [2] Question 3 Identify the hormone produced by the pancreas that lowers blood glucose levels. [1] Question 4 Plants respond to their environment through growth movements. Define ‘phototropism’. [2] State the name of the plant hormone responsible for controlling phototropism. [1] Question 5 Compare the structure and function of a sensory neuron and a motor neuron. [4] ...
Marking Scheme: Coordination and Response This is the marking scheme for quiz: Coordination And Response Section 1: Core Syllabus Question 1 An automatic [1] Rapid/unconscious response to a stimulus [1] Question 2 (a) Muscle or gland that carries out the response [1] (b) Protects the organism from harm [1] by reacting quickly without waiting for brain processing [1] Question 3 Insulin [1] Question 4 (a) Growth of a plant [1] in response to light [1] (b) Auxin [1] ...