Spiracles Study guides, Class notes & Summaries

AQA A-Level Biology Topic 3 Already Passed Why are Microorganisms able to perform exchange via their surface? • have a large surface area to volume ratio • have a short diffusion distance • have low demand How do Microorganisms Obtain Nutrients & Remove Waste? • by exchange via their surface • nutrients (e.g. glucose, oxygen) move in by diffusion via their surface • waste (e.g. carbon dioxide) move out by diffusion via their surface Why can't Animals/Plants perform exchange via th...

AQA AS BIOLOGY 7401 EXAM WITH QUESTIONS AND CORRECT VERIFIED ANSWERS LATEST UPDATE.// Biology AS AQA What are the advantages of multi-cellular organisms? - CORRECT ANSW--able to move -able to hunt(likely to he in top if food chain) -able to adapt to environment -specialised body reigons -able to find a mate What are the disadvantages of multi-cellular organisms? - CORRECT ANSW-As they get bigger diffusion is less efficient and specia...

PCA Insects, Mites and Other Invertebrates Questions with 100% Correct Answers 6 parts of a spider - Answer cephalothorax, abdomen, legs, eyes, palps and chelicera. 7 main parts of an insect - Answer head,antenna, mouthparts, thorax, wings, legs and abdomen. Aphytis melinus - Answer California red scale( citrus. assassin bugs - Answer flies caterpillars. big eyed bugs - Answer mites aphids bollworms and whiteflies. Blood-feeding mouthparts of insects - Answer - Insects like m...

AQA A-Level Biology - Topic 3 (2022/2023) with Verified Answers Smaller organisms have a ........... surface area to volume ratio Higher How do single called organisms exchange substances? Diffuse directly into or out of the cell across the cell surface membrane Give 2 reasons why in multicellular organisms, diffusion across outer membrane would be too slow? 1. Some cells deep within body- big distance between them and outside 2. Larger animals have low surface area to volume ratio- difficult ...

Examples of respiratory structures of terrestrial animals -:- bulk flow with tracheal system and spiracles (insects), cutaneous (frog) Examples of respiratory structures of aquatic animals -:- bulk flow (sponges, cnidarians), gills, water vascular system, arborescent respiratory trees (sea cucumber), cutaneous (leech) Do all aquatic animals necessarily exchange gasses in water? -:- No, some aquatic animals could exchange gasses above water using lungs, like aquatic mammals, or cuta...

What is the difference between blood and hemolymph? - Blood: In a Closed circulatory system and is confined to vessels. Hemolymph (AKA interstitial fluid): In an Open circulatory system and bathes the body cells. What are the major types of blood cells? - red and white cells What adaptations allow an animal to use diffusion across its skin as the only mechanism for gas exchange? - The animal must be thin and have a large surface area. Animals that only diffuse across the skin have a dense ...

What is the difference between blood and hemolymph? -:- Blood: In a Closed circulatory system and is confined to vessels. Hemolymph (AKA interstitial fluid): In an Open circulatory system and bathes the body cells. What are the major types of blood cells? -:- red and white cells What adaptations allow an animal to use diffusion across its skin as the only mechanism for gas exchange? -:- The animal must be thin and have a large surface area. Animals that only diffuse across the ski...

What is the difference between blood and hemolymph? - Blood: In a Closed circulatory system and is confined to vessels. Hemolymph (AKA interstitial fluid): In an Open circulatory system and bathes the body cells. What are the major types of blood cells? - red and white cells What adaptations allow an animal to use diffusion across its skin as the only mechanism for gas exchange? - The animal must be thin and have a large surface area. Animals that only diffuse across the skin have a dense ...

DAT STUDY SET (Structure and Functions of Systems) Exam Questions With Accurate Answers. What are tissues? - answerGroups of cells that are similar in structure and function What is negative feedback? - answerBringing conditions back to their normal or homeostatic function What is positive feedback? - answerFeedback that increases the output of a process. What is respiration? - answerMovement of gases in and out; can also mean cellular respiration in which ATP is produced in the mitochon...

AQA A-Level Biology - Topic 3 All Answers Correct Smaller organisms have a ........... surface area to volume ratio How do single called organisms exchange substances? Higher Diffuse directly into or out of the cell across the cell surface membrane Give 2 reasons why in multicellular organisms, diffusion across outer membrane would be too slow? 1. Some cells deep within body- big distance between them and outside 2. Larger animals have low surface area to volume ratio- difficul...