Xylem and phloem - Study guides, Class notes & Summaries

AQA A LEVEL BIOLOGY Paper 1 2024 What is the function of the cell membrane? - ANS To control what enters and leaves the cell, acts as a barrier between the cell and its environment. What structural feature of the cell membrane allows substances to enter/leave? - ANS Partially permeable What is the fluid mosaic model? - ANS States that a membrane is a fluid structure (because phospholipids are constantly moving) with a "mosaic" of various proteins embedded in it Describe the...

Louisiana Horticulture Test Study Guide (2024) || Complete Questions & Answers (100% Verified) Louisiana Horticulture Test Study Guide (2024) || Complete Questions & Answers (100% Verified) What is the difference between a cultivar and variety? - ANSWER - Cultivar- A plant or grouping of plants selected for desirable characteristics that can be maintained by propagation Variety- A naturally occurring subgroup of a species which has some distinguishing characters Who is Linnaeus? What s...

What are xylem? : Tubes that carry water and mineral ions in solution; water travels upwards from roots to leaves. They are formed from dead cells. How is water transported in the xylem? : THE COHESION-TENSION THEORY: 1)Water evaporates from the leaves- transpiration. 2)This creats tension which pulls more water into the leaf. 3)Water molecules are cohesive so the whole column of water moves upwards. 4)Water enters the stem via the roots. What is transpiration? : When water evaporates...

What happens when a suitable substrate binds to an enzyme? - ANSWER-The active site amino acids bond with the substrate Cyanide binds to cytochrome oxidase at a site where the substrate oxygen would normally bind. This is an example of - ANSWER-competitive inhibition an example of a catabolic reaction is - ANSWER-lactate fermentation what is an anabolic process that is endergonic and endothermic? - ANSWER-CH₄ +2O₂ → CO₂ + 2H₂O ATP yields 7.3 kcal/mol of free energy and it i...

What are xylem? - Answer Tubes that carry water and mineral ions in solution; water travels upwards from roots to leaves. They are formed from dead cells. How is water transported in the xylem? - Answer THE COHESION-TENSION THEORY: 1)Water evaporates from the leaves- transpiration. 2)This creats tension which pulls more water into the leaf. 3)Water molecules are cohesive so the whole column of water moves upwards. 4)Water enters the stem via the roots. What is transpiration? - An...

AQA A Level Biology- Xylem and Phloem Exam 2024/2025 Questions Only Which Are Verified.

ISA Arborist Certification Study Guide Chapter 1 with Complete SolutionsISA Arborist Certification Study Guide Chapter 1 with Complete SolutionsISA Arborist Certification Study Guide Chapter 1 with Complete SolutionsISA Arborist Certification Study Guide Chapter 1 with Complete Solutions Meristems - ANSWER-Sites of rapid cell division in the shoot tips, root tips, and cambium are called ____________. Apical - ANSWER-Meristems located at the end of the shoots are called primary or _________...

Plants Architecture - correct answer-Plant needs i. collection & conversion of solar energy -> leaves ii. positioning & support of leaves -> stems iii. anchorage & absorption -> roots iv. transport -> vascular system Leaf Structure - correct answer-Epidermis, Mesophyll, and Vein (Vascular Bundle) Epidermis contains what? - correct answer-- Cuticle - Guard cells with Stomata Epidermis - correct answer-outermost cell layer of a plant body cutin: (wax) excreted by epider...

Arborist Certification Study Guide 452 Questions with Correct Answers 2024 Sites of rapid cell division in the shoot tips, root tips, and cambium. - Correct Answer Meristem Meristems located at the end of the shoot are called primary, or _________ meristems - Correct Answer Apical meristem Buds are covered by _____________ that leave permanent scars on the twig when the buds break dormancy. These scars can be useful in tree ID. - Correct Answer Scales The tendency for terminal buds to ...

what is the precise composition of sporopollenin? - Its precise composition is unknown but it contains phenolic substances, fatty acids, and phenylpropanoids There are four key traits that land plants share only with charophyceans. what are they? - 1. structure of flagellated sperm, 2. rose shaped complexes for cellulose synthesis, 3. peroxisome enzymes (photorespiration), 4. formation of a phragmoplast what is the mesophyll? - The ground tissue of a leaf is sandwiched between the upper a...

Plants Architecture Plant needs i. collection & conversion of solar energy -> leaves ii. positioning & support of leaves -> stems iii. anchorage & absorption -> roots iv. transport -> vascular system Leaf Structure Epidermis, Mesophyll, and Vein (Vascular Bundle) Epidermis contains what? - Cuticle - Guard cells with Stomata Epidermis outermost cell layer of a plant body cutin: (wax) excreted by epidermis Cuticle Waxy waterproof covering of a plant.Produced by the epidermis ...