Pollen - Study guides, Class notes & Summaries

Arrange the following structures, which can be found on male pine trees, from the largest structure to the smallest structure (or from most inclusive to least inclusive). a.)pollen cone, sporophyte, microspores, microsporangia, pollen nuclei b.)sporophyte, pollen cone, microsporangia, microspores, pollen nuclei c.)sporophyte, microspores, microsporangia, pollen nuclei, pollen cone d.)pollen cone, microsporangia, microspores, pollen nuclei, sporophyte correct answers b.)sporophyte, pollen c...

Define the following Terms: 1. Allergy: An excessive reaction that leads to an inflammatory response when a person comes into contact with a substance (allergen) to which he or she is sensitive. It is common immune response to substances such as pollen, animal dander, food, or dust. Also known as hypersensitivity. 2. Antihistamine: Drugs that stop histamines from attaching to histamine receptors in the tissues and producing inflammatory and allergic symptoms. This action counteracts the re...

BPS 1101 – Final Exam Study Guide Questions with Complete Solutions What are allergies? - Correct Answer Adverse reaction to harmless materials. What is your immune system responding to in the case of allergies? - Correct Answer Epitopes of molecules from pathogens. How does your immune system "remember" the material? - Correct Answer Memory cells How does subsequent exposure produce a reaction? - Correct Answer -Protection from pathogens Will you get an allergic response from t...

3 ways cowbirds find hosts - 1. sit high on perch and look around 2. walk on ground and look 3. drive birds off by scaring them so that they can lay their eggs 4 advantages of seed dispersal - -Avoids crowding competition -Prevents spread of disease -Prevents in-breeding -Saves some offspring from being eaten 5 adaptations of obligate brood parasites - 1. fast egg laying (20-40 sec for cowbirds) 2. thicker egg shells 3. fast hatching egg 4. removal of host egg prior to laying 5. baby ...

How do you investigate the effect of sucrose concentration on the growth of pollen tubes? - Answer 1. Make up solutions of sucrose between 0.2-2 moldm-3 2. Collect a petri dish for each sucrose concentration and place a moistened filter paper on each 3. Collect one microscope slide per concentration 4. Place a few drops of sucrose plus mineral salt medium in the dip of each slide 5. Gently rub the point of a mounted needle over the mature anthers of a flower so the pollen falls on the slid...

Question 1. Based on figure 4.1, is it correct to state that we understand deep relationships among Eukaryotes? How do we represent ambiguity in branching pattern on phylogenetic trees? Hint: look at figure 1.27. No, we cannot say we understand deep relationships among Eukaryotes because there is a polytomy that represents ambiguity on the phylogenetic tree. No, you cannot define deep relationships amongst eukaryotes because the nodes include polytomies which signifies ambiguity/indefinite...

1# problem for predators - Starvation Active searching - (search and capture) Walking around until they pick up a trail of prey. Wolfs, wolf spiders, Tiger beetles. Adaptations for storing food - Enlarged salivary glands that make food sticky can stick to places. Nest early, Memory (a large hippocampus provides excellent spatial memory). Chickadee's hippocampus grows larger before winter. Adaptions of Brown Headed Cowbirds - Fast egg laying, 20-40 seconds compare to hour to not get caugh...

Bio 112 Exam 3 Janes TAMU Latest Update Graded A+ Bryophytes Characteristics Vascular: no Seed Bearing: no Dominant Generation: gametophyte Examples/Phyla: liverwort, mosses, hornwort Special features: use spores, no seeds, need water for reproduction Paleozoic or Mesozoic: Paleozoic Ferns Characteristics Vascular: yes Seed Bearing: no Dominant Generation: sporophyte Examples/Phyla: monilophyta Special features: have sporangium Paleozoic or Mesozoic: Paleozoic Gymnosperms C...

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...

QUESTION What condition leads to a barrel chest? Answer: emphysema QUESTION What allows pneumonia to develop? Answer: inflammation in the lung parenchyma QUESTION Extrinsic asthma Answer: the immune system responds to the presence of allergens (e.g., pollen, mold) by causing bronchoconstriction QUESTION What is acute respiratory failure? Answer: life-threatening inability of the lungs to maintain adequate oxygenation ...