Pollen Study guides, Class notes & Summaries

What are allergies? - Answer- Adverse reaction to harmless materials. What is your immune system responding to in the case of allergies? - Answer- Epitopes of molecules from pathogens. How does your immune system "remember" the material? - Answer- Memory cells How does subsequent exposure produce a reaction? - Answer- -Protection from pathogens Will you get an allergic response from the first exposure? - Answer- Not usually What is Hay fever? - Answer- A reaction to pollen. W...

Gymnosperms - Answer-(conifers) Seeds not enclosed in ripened ovary. Angiosperms - Answer-(Flowering plants) Seeds are enclosed in a ripened ovary/fruit. 7 characteristics of seed plants - Answer-1. Megaphyllous leaves (branched veins w/ leaf trace gaps) 2. Heterospory [advanced] (production of spores of two different sizes and sexes) 3. Eusporangiate 4. Xylem and phloem 5. Dominant and independent sporophyte 6. Gametophyte is dependent on the sporophyte for nutrition 7. Reproduce by see...

Gymnosperms (conifers) Seeds not enclosed in ripened ovary. Angiosperms (Flowering plants) Seeds are enclosed in a ripened ovary/fruit. 7 characteristics of seed plants 1. Megaphyllous leaves (branched veins w/ leaf trace gaps) 2. Heterospory [advanced] (production of spores of two different sizes and sexes) 3. Eusporangiate 4. Xylem and phloem 5. Dominant and independent sporophyte 6. Gametophyte is dependent on the sporophyte for nutrition 7. Reproduce by seeds Se...

A dog is following the scent of a jackrabbit. Which of the following accurately describes how the dog's brain integrates information for smell? A) Chemoreceptors in the brain send impulses for smell in the nasal cavity. B) Chemoreceptor cells in the nasal cavity sends impulses to the appropriate area of the brain. C) Chemoreceptors on epithelial cells of the tongue send hormones to the appropriate area of the brain. D) Receptors originating in the nose send action potentials to the motor re...

NGN ATI RN Pediatrics Exam 2023 A V1 | Questions and Verified Answers| 100% Correct| Grade A Q: A nurse is caring for a school-age child who is receiving chemotherapy and is severely immunocompromised. Which of the following actions should the nurse take? Answer: Screen the child's visitors for indications of infection. Rationale: A child who is severely immunocompromised is unable to adequately respond to infectious organisms, resulting in the potential for overwhelming infection. ...

Upper respiratory tract -sinus, nasal cavity, pharynx, epiglottis and larynx -normal microbiota reside here Lower respiratory tract -trachea, lungs (bronchi and alveoli), parenchyma and diaphragm Brainpower Read More Previous Play Next Rewind 10 seconds Move forward 10 seconds Unmute 0:01 / 0:15 Full screen Respiratory tract defense mechanisms -URT: has normal biota that inhibit other organisms -ciliated epithelial cells: work to push MOs or pollen up out of the thro...

College aantekeningen Anthropology of Violence

Question Number Answer Additional Guidance Mark 1(a) The only correct answer is B A is incorrect because Down’s syndrome is an example of polysomy not monosomy C is incorrect because Down’s syndrome is caused by a chromosome mutation not a gene mutation D is incorrect because Down’s syndrome is caused by a chromosome mutation not a gene mutation (1) Question Number Answer Additional Guidance Mark 1(b) An answer that makes reference to the following: • birth order has no e...

Test Bank for Genetics A Conceptual Approach, 7th Edition Benjamin Pierce Test Bank for Chapter 2: Chromosomes and Cellular Reproduction Multiple-Choice Questions 1. Which of the following statements is false? a. Errors in chromosome separation are rarely a problem for an organism. b. Errors in chromosome separation can result in a miscarriage. c. Errors in chromosome separation can result in cancer. d. Errors in chromosome separation can result in a child with severe handicaps. e. Erro...

Seed Evolution Steps - ANSWER Homospory Heterospory Megasporangium Surrounded by Sterile Telomes Free Tips Phylum Cycadophyta - ANSWER Earliest Gymnosperms Mesozoic Era (65-230 MYA) 11-12 Genera Mostly tropical and subtropical Resemble palms - unlike palms they have a vascular cambium (stem can increase in width) Often highly toxic to dogs, cats, and livestock Reproductive structures associated with modified leaves - microsporophylls and megasporophylls Loosely or tightly clustered ...