Biology 20/10/2020
🇬🇧
In English
In English
Practice Known Questions
Stay up to date with your due questions
Complete 5 questions to enable practice
Exams
Exam: Test your skills
Course needs 15 questions
Learn New Questions
Manual Mode [BETA]
The course owner has not enabled manual mode
Specific modes
Learn with flashcards
Complete the sentence
Listening & SpellingSpelling: Type what you hear
multiple choiceMultiple choice mode
SpeakingAnswer with voice
Speaking & ListeningPractice pronunciation
TypingTyping only mode
Biology 20/10/2020 - Leaderboard
Biology 20/10/2020 - Details
Levels:
Questions:
7 questions
| 🇬🇧 | 🇬🇧 |
| Symbol equation for photosynthesis | 6CO2 + 6H2O --> C6H1206 + 602 |
| Where are the most chlorophyl found in a leaf? | Palliside mesophyl and spongey mesophyll. |
| What do the xylem and phloem transport | Xylem-Water & mineral salts Phloem-Sucrose & amino acidds |
| Describe the four molecules produced from glucose in biosynthesis? | Proriens - glucose + nitrates = amino acids. Lost of amino acids > protien Lipids - used for storage in seeds Starch - Lots of glucose molecules > starch, insolluble glucose stored Cellulose - Used to build and add strength to cell walls |
| Practical to investigate how light intensity effects photosynthesis | 1)Fill boiling tube 45cm^2 sodium hydrocarbonate soloution, leave for a few mins then shake air bubbles out. 2)Cut 8cm pondweed and place carefullt in boiling tube. 3)Place 10cm away from light source count n.o. bubbles for 5 minutes. 5)repeat at further distanes at interval of 5cm. 4)repeat 5 times and calculate average mean. |
| Give 4 extensions to the light intensity practical. | 1)Collect gas in syringe. 2)Use data logging equipment to mesure oxygen concetration. 3)Use acecate filters to mesure effects of different wavelengths. 4)Use veriegated plants - Drop veriegated leaf in boiling water to kill and preserve it. - Leave in hot ethanol for 10 minutes to remove chlorophyll. - Dip in boiling water to soften then spread in petri dish and cover with iodine. - Areas that had chlorophyl > blue/black, areas without remain pale. |
| What is the fuction of the Phloem and Xylem? | Phloem-translocation-elongated living cells-small pores-transport mainly dissolved sugars-both directions Xylem-transpiration-dead cells-strenthened with lignin-carry water and mineral ions up the plant |
| Whats transpiration? | The movement of water up a plant caused by evapouration and diffision |
| What is a pathogen? | Microorganism enters body causes disease |