Concept explainers
To determine: Whether the orchid flowers show radial symmetry or bilateral symmetry.
Introduction: A flower consists of four whorls, sepal, petal, stamen, and carpel. The outer whorls, which are sepals and petals, protect the inner parts of the flower and it also attracts the insects. The inner parts are stamen and carpel, which represent the male and female reproductive systems.
To determine: Whether orchid flowers are likely to be pollinated by wind or animals.
Introduction: A flower consists of four whorls, sepal, petal, stamen, and carpel. The outer whorls, which are sepals and petals, protect the inner parts of the flower and they also attract the insects. The inner parts are stamen and carpel, which represent the male and female reproductive systems, respectively.
To determine: The gene that might be involved in the production of the orchid flower shape.
Introduction: A flower consists of four whorls, sepal, petal, stamen, and carpel. The outer whorls, which are sepals and petals, protect the inner parts of the flower and they also attract the insects. The inner parts are stamen and carpel, which represent the male and female reproductive systems, respectively.
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BIOLOGY-TEXT
- Give examples for each type of the following1. Complete and incomplete flowers2. Perfect and imperfect flowers3. Regular and irregular flowers4. Explain pollination processarrow_forwardAmong the animal, insects particularly bees are the dominant pollinating agents. List any four characteristic features of the insect pollinated flower.arrow_forwardName the structure indicated by the letter A. Name the structure indicated by the letter B Name the structure indicated by the letter C. What is the term used to describe this part the flower indicated by the letter D? Is the structure in the image indicated by the letter D considered male or female?arrow_forward
- Suppose that 100 pollen grains land on a stigma, and 50 mature seeds are formed in the fruit. What does this indicate about the pollination process and success? A) 100% success: 100 pollen grains grew to 50 ovules, two to each, and double fertilization occurred. B) 100% success: Only 50% of the pollen grains germinated, but each produced 2 sperms to complete double fertilization in 50 seeds. C) 50% success: 50 sperm fertilized 50 eggs, and 50 sperm fused with 50 polar nuclei. D) 50% success: 50 sperm fertilized 50 eggs, and 50 sperm fused with 100 polar nuclei. correct answer and explanation why please.arrow_forwardWhat is the difference between self-pollination and cross-pollination? If pollen is transferred from the stamens of a flower to the stigma of the very same flower, is that cross-pollination or self-pollination? If it is transferredfrom the stamen of one flower to the stigma of another flower on the very same plant? If it is transferred from the stamen of one flower to the stigma of another flower on a different plant, but a plant that is a clone of the first one? Animals do not have pollen, of course, but why is it that most animals never have to worry about the equivalent problem of self-fertilization? Why cannot most animals fertilize themselves?arrow_forwardDoes red color generally attract birds and so facilitate pollination in a wide range of flowers?arrow_forward
- Draw caballero flower according to its sexuality, with its staminal column exposedarrow_forwardMany flowers have both anthers and pistils. What prevents self-pollination and later self-fertilization?arrow_forwardAbout 100 years ago, C. E. Bessey developed the hypothesis of the “ranalean” flower. What are some of the characters of this type of flower? Is the ranalean flower wind pollinated or insect pollinated?arrow_forward
- Identify the structure number seven on the flower belowarrow_forwardIn Sunflower, If the flower is gamopetalous, are the stamens epipetalous? If so, are the stamens inserted on the tube or on the throat of the corolla? Are the stamens connivant or not? If there are as many stamens as petals, are the stamens opposite or alternate with the petals or lobes of the corolla? Split the corolla from top to bottom to determine this.arrow_forwarddiscuss the pollination process.arrow_forward
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