
Describe how the parts of an ovule (integument. megaspore, megasporangium) correspond to the parts of a seed

To describe: The way in which the parts of an ovule such as integument, megaspore, and megasporangium develop into the corresponding parts of a seed.
Introduction: The ovule in the female plant contains a single or a double layer of the diploid integument (2n). The megaspore cell is haploid (n) inside the ovule. The tissue megasporangium (2n) is present inside the ovule. The fertilization of the ovule by the sperm leads to the formation of the diploid zygote. It forms the seed ahead.
Explanation of Solution
The integument is the outer layer of the ovule in the female, which is diploid (2n). The megaspore cell is haploid inside the ovule. The tissue megasporangium inside the ovule is diploid (2n). The haploid (n) sperm cell enters the ovule through the pollen tube and fertilizes it. This leads to the formation of the fertilized diploid zygote in the plants like angiosperms and the gymnosperms. The other two haploid cells are fertilized by the other sperm to form the triploid (3n) cell containing the endosperm. This leads to the formation of the complete seed. The seed contains the fertilized ovule inside. The development of the seed takes place to form the seed coat, spore wall, and the inner tissue that supplies the food and nutrition.
The fertilization of the female ovule (n) takes place by the help of the male haploid (n) sperm. This leads to the formation of the diploid fertilized zygote (2n). The zygote then grows to form the seed containing the nutritious tissue, which provides the food and water. The other two haploid cells inside the ovule get fertilized by the sperm cell to form the triploid cell inside the ovule. This forms the complete seed in the plants.
Want to see more full solutions like this?
Chapter 30 Solutions
Campbell Biology: Custom Edition
- You intend to insert patched dominant negative DNA into the left half of the neural tube of a chick. 1) Which side of the neural tube would you put the positive electrode to ensure that the DNA ends up on the left side? 2) What would be the internal (within the embryo) control for this experiment? 3) How can you be sure that the electroporation method itself is not impacting the embryo? 4) What would you do to ensure that the electroporation is working? How can you tell?arrow_forwardDescribe a method to document the diffusion path and gradient of Sonic Hedgehog through the chicken embryo. If modifying the protein, what is one thing you have to consider in regards to maintaining the protein’s function?arrow_forwardThe following table is from Kumar et. al. Highly Selective Dopamine D3 Receptor (DR) Antagonists and Partial Agonists Based on Eticlopride and the D3R Crystal Structure: New Leads for Opioid Dependence Treatment. J. Med Chem 2016.arrow_forward
- The following figure is from Caterina et al. The capsaicin receptor: a heat activated ion channel in the pain pathway. Nature, 1997. Black boxes indicate capsaicin, white circles indicate resinferatoxin. You are a chef in a fancy new science-themed restaurant. You have a recipe that calls for 1 teaspoon of resinferatoxin, but you feel uncomfortable serving foods with "toxins" in them. How much capsaicin could you substitute instead?arrow_forwardWhat protein is necessary for packaging acetylcholine into synaptic vesicles?arrow_forward1. Match each vocabulary term to its best descriptor A. affinity B. efficacy C. inert D. mimic E. how drugs move through body F. how drugs bind Kd Bmax Agonist Antagonist Pharmacokinetics Pharmacodynamicsarrow_forward
- 50 mg dose of a drug is given orally to a patient. The bioavailability of the drug is 0.2. What is the volume of distribution of the drug if the plasma concentration is 1 mg/L? Be sure to provide units.arrow_forwardDetermine Kd and Bmax from the following Scatchard plot. Make sure to include units.arrow_forwardChoose a catecholamine neurotransmitter and describe/draw the components of the synapse important for its signaling including synthesis, packaging into vesicles, receptors, transporters/degradative enzymes. Describe 2 drugs that can act on this system.arrow_forward
- The following figure is from Caterina et al. The capsaicin receptor: a heat activated ion channel in the pain pathway. Nature, 1997. Black boxes indicate capsaicin, white circles indicate resinferatoxin. a) Which has a higher potency? b) Which is has a higher efficacy? c) What is the approximate Kd of capsaicin in uM? (you can round to the nearest power of 10)arrow_forwardWhat is the rate-limiting-step for serotonin synthesis?arrow_forwardWhat enzyme is necessary for synthesis of all of the monoamines?arrow_forward
- Concepts of BiologyBiologyISBN:9781938168116Author:Samantha Fowler, Rebecca Roush, James WisePublisher:OpenStax CollegeBiology: The Dynamic Science (MindTap Course List)BiologyISBN:9781305389892Author:Peter J. Russell, Paul E. Hertz, Beverly McMillanPublisher:Cengage Learning
- Biology 2eBiologyISBN:9781947172517Author:Matthew Douglas, Jung Choi, Mary Ann ClarkPublisher:OpenStax



