Auxins - Study guides, Revision notes & Summaries

Plant Hormones Complete Exam Test Guide 2024. Plant growth follows patterns that are the same for all species? (True or False) - ANSWER False Plant Growth: - ANSWER Chemicals direct, control, and regulate plant growth Meristems are found at places where plants grow rapidly Even very old plants continue to grow What is a hormone? - ANSWER a substance that is produces in one part of an organism and affects another part of the same individual 2 ways in which plant hormones control plan...

Aqa a level Biology - Topic 6 - survival and response questions and answers well illustrated. What is a stimulus? - correct answer. A change in the environment of an organism What is a tactic response? - correct answer. Directional movement in response to a stimulus What is a kinetic response? - correct answer. Non directional random movement in response to a stimulus What is a positive and negative taxis? - correct answer. Positive taxis- organism moves tow...

Auxin is a plant hormone produced in the shoot tip. Auxin causes cell elongation and travels down the stem from the tip. Auxin is destroyed by sunlight. Explain how this leads to positive phototropism in the plant. Correct Answer Auxin is broken down on the sunny side of the plant. Cells on the shaded side will elongate due to auxin, causing curvature of the stem so that the plant grows towards the light. Ivy plants often use walls or other plants as a support when growing. State the type of ...

PSB exam-150 Practice Questions with Complete Solutions What are the factors that differ for potential and kinetic energy? - CORRECT ANSWER Activity - in motion or in storage What happens when a small amount of soap is added to hard water? - CORRECT ANSWER A scum is formed Which of the following properties is considered a physical property? - CORRECT ANSWER Boiling point Semicircular canals are thought to be most sensitive to which of the following? - CORRECT ANSWER Gravity Which o...

Abiotic components - correct answer Components of an ecosystem that are non living Abiotic factors - correct answer Non living components of an ecosystem that effect other living organisms Acetycholine - correct answer Chemical that acts as a transmitter that diffuses across synaptic cleft Acetycholinesterase - correct answer Enzyme in synaptic cleft that breaks down acetycholine. After it has triggered an action potential in the post synaptic neurone, acetycholine must be broken down o...

USABO semi-final part A&B Questions and Answers 100% Correct. 1) The recent SARS virus is a: a) Lentivirus b) Coronavirus c) Egtved virus d) Baculovirus e) Retrovirus 2) Which of the following cell organelles is typically identified by its sedimentation coefficient? a) Golgi apparatus b) Mitochondria c) Nucleus d) Nucleolus e) Ribosome 3) Timber companies plant trees right after clear-cutting. Which of the following ecological and/or evolutionary processes would, in principle, take...

Flower parts to know Petal, stigma, style, ovary, ovule, stem, stamen, filament, anther What must happen for a flowering plant to reproduce by self-pollination? Pollen grain transferred from anther to stigma on the same flower What are the benefits of an organism receiving an injection of a weakened or killed virus? (Vaccine) Improves an immune system's resistance to viruses and builds antibodies What type of particles require a host cell to reproduce? Viral particles/viruses Shoot (plant) ...

Detailed and comprehensive notes on topic 8 (grey matter) of Edexcel biology A Level. Covers neuron structure, synaptic transmission, resting potential, action potentials, nerve impulse propagation, pupil reflex, photoreceptors, auxins, phytochrome, the brain, imaging techniques, visual cortex/development, habituation, drug use, genomic sequencing, GMOs and core practical 18. Notes are organised alongside the specification to make your revision easier and more structured. I hope that you find th...

Edexcel A level Biology Exam Study Guide Solutions Molecular phylogeny - ANSWER-It compares the structure of a particular molecule from different organisms to discover their degree of evolutionary relation. Somatic cell - ANSWER-A cell in an organism which isn't a gamete. DNA - ANSWER-Deoxyribose nucleic acid. Carries the genetic information for cells and some viruses. mRNA - ANSWER-Messenger ribose nucleic acid (single stranded). The product of transcription. Speciation - ANSWER-The p...

A LEVEL BIOLOGY: 25 Mark essays With Complete Solutions The importance of shapes fitting together in cells and organisms *Enzyme properties and digestion *Antigens, antibodies, B cells & T cells *Structure of DNA *DNA replication *Transcription and translation *Restriction enzymes *Muscle contraction *Action potentials and synaptic transmission *Control of blood glucose concentration How bacteria can affect the lives of humans and other organisms *Pathogens *Resistance to anti...