Gametophytes - Study guides, Class notes & Summaries

UNT Biology 1710 Practice Exam 3|52 Questions with Verified Answers An excellent example of the genetic phenomenon known as continuous variation would be: a. flower color in plants. b. height in humans. c. human blood groups. d. epistasis. e. fur color in arctic animals - CORRECT ANSWER B) height in humans A human genetic trait passed from one generation to the next has an unusual inheritance pattern. The genotype and phenotype of the offspring depends only upon the genotype of the mo...

Importance of plants Correct Answer-food, natural products, ecosystem services (oxygen, ozone, coal), culture Preadaptations of Charophytes Correct Answer-fresh water spores covered in sporopollenin, life cycle allows dispersal by wind (spores) Gametophyte Correct Answer-haploid (n), makes gametes by mitosis Sporophyte Correct Answer-diploid (2n), makes spores by meiosis Alternation of Generations Correct Answer-Gametophytes go through mitosis to create gametes, which form zygote, zy...

A. Leaves Carpels are modified __________ that enclose the seeds: A. Leaves B. Petals C. Sepals D. Gametophytes B. Four carpels, each carpel with one seed cavity This tomato that you bought in the supermarket and sliced at home has: A. One single carpel with 4 "seed cavities" B. Four carpels, each carpel with one seed cavity C. Unknown number of carpels D. Carpels that are not fused but free C. The ovary of a carpel Most fruits that you buy in the supermarket will still have: ...

charophytes - (aquatic) green algae land plants evolved from 3 key traits land plants share with charophytes - 1. rings of cellulose-synthesizing proteins embedded in plasma membrane 2. formation of a phragmoplast (helps form cell wall) 3. structure of flagellated sperm (not all will have this) adaptations enabling plants' move to land: why? - 1. CO2 2. sunlight 3. soil- nutrients 4. fewer predators/pathogens (never been seen before) adaptations enabling plants' move to land: pro...

charophytes - (aquatic) green algae land plants evolved from 3 key traits land plants share with charophytes - 1. rings of cellulose-synthesizing proteins embedded in plasma membrane 2. formation of a phragmoplast (helps form cell wall) 3. structure of flagellated sperm (not all will have this) adaptations enabling plants' move to land: why? - 1. CO2 2. sunlight 3. soil- nutrients 4. fewer predators/pathogens (never been seen before) adaptations enabling plants' move to land: problems...

Part A All seed plants _____. - are heterosporous Correct: All seed plants produce separate male and female spores. Part A An ancient date palm seed germinated and grew into a healthy plant. What was the source of nutrients for the young sporophyte embryo during germination of the date palm seed? - food stored within the seed Correct: A seed consists of an embryo and a food supply, packaged in a protective seed coat derived from the integument(s). Part A Angiosperms are different from ...

1. In most fungi, karyogamy does not immediately follow plasmogamy, which consequently A) means that sexual reproduction cannot occur. B) decreases the overall size of the organism. C) allows fungi withstand harsh conditions in a dormant state. D) results in heterokaryotic or dikaryotic cells. - Answer-D) results in heterokaryotic or dikaryotic cells. 2. Which of the following best describes the physical relationship of the partners involved in lichens? A) Fungal cells are enclosed within ...

Part A Angiosperms are most closely related to _____. - gymnosperms Correct: The branching pattern of the phylogenetic tree in the activity indicates that angiosperms are most closely related to gymnosperms. Part A During the Carboniferous period, forests consisting mainly of _____ produced vast quantities of organic matter, which was buried and later became coal. - ferns and other seedless plants Correct: These were the dominant plant types of the time. Part A In contrast to bryophytes...

Flowers - specialized structure for sexual reproduction, pollination by animals (insects, mammals, birds) and wind Seed - consists of an embryo and nutrients surrounded by a protective coat. Gametophytes of seed plants - develop within the walls of spores that are retained within tissues of the parent sporophyte The ancestors of seed plants were most likely_____, while seed plants are ________. - homosporous; heterosporous Ovule - consists of a megasporangium, megaspore, and one or more p...

Why are cations difficult to get access to in the soil? - They are difficult because they bond tightly to the soil so another cation has to come break their bond Clay is negatively charged and tightly bind to cations making it difficult to uptake from soil Is the need for CO2 and O2 in leaves the same when compared to roots? - The difference is because of what the plant needs at that certain spot. The CO2 is needed for photosynthesis to make sugar for the plant What are the two key tissues...

"Hairy Flagellum" of Stramenopile - A flagellum with hair-like appendages; unique to the group Stramenopile. "Slug" - An aggregation of slime mold cells to essentially form a multicellular body. Absorption - A mode of nutrition in some Ciliates. Active transport - Energy-requiring process that moves material across a cell membrane against a concentration difference. Agar - Another material that makes up cell walls of Red Algae. Alginate - A material that makes up the cell wall of Brow...