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- Dictionarypolygamy/pəˈlɪɡəmi/
noun
- 1. the practice or custom of having more than one wife or husband at the same time.
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A plant is termed as polygamous if it bears some flowers with stamens only, some with pistils only, and some with both, on the same or different plants.For example, Acer rubrum (red maple). Write your answer. Register or Login. Cookie.
4. Polygamy: When two egg pronuclei unite with single male pro-nucleus, the phenomenon is known as polygamy, e.g., sea urchins, polychaete worms, urodels and rabbits. Gynogenesis: When only sperm activates the egg but its pro-nucleus does not unite with the egg pro-nucleus, the phenomenon is known as gynogenesis, e.g., planarians and nematodes.
Meaning of Polyploidy 2. Types of Polyploids 3. Causes or Origin of Polyploidy 4. Techniques of Inducing Polyploidy 5. Evolution 6. Practical Value 7. Role in Plant Breeding 8. Some Artificially Produced Polyploids. Meaning of Polyploidy: An organism having more than two sets of homologous chromosomes is known as polyploid and the phenomenon ...
Meaning of Parasitism 2. Origin and Evolution of Parasitism 3. Kinds 4. Parasitic Adaptations. Meaning of Parasitism: Parasitism is defined as the association of two organisms of same or different species, in which one lives at the cost of other. A parasite is that which lives on other organism called a host, receiving nourishment and shelter ...
ADVERTISEMENTS: In this article we will discuss about Spicules:- 1. Meaning of Spicules 2. Classification of Spicules 3. Development 4. Taxonomic Importance. Meaning of Spicules: The spicules or sclerites are definite bodies, having a crystalline appearance and consisting in general of simple spines or of spines radiating from a point. They have an axis of […]
Meaning of Flora: “Flora is a systematic account of plants of a defined geographical area and provides keys and descriptions of plants for identification”. Primary Flora helps in identification of species. It also provides other data like local or vernacular name, distribution, botanical name used, description of a particular plant ...
In this article we will discuss about:- 1. Meaning of Xenobiotic Compounds 2. Types of Recalcitrant Xenobiotic Compounds 3. Hazards 4. General Features of Biodegradation 5. Co-Metabolism and Gratuitous Metabolism 6. Biodegradation of Halogenated Compounds 7. The Origin of Capacity to Degrade Xenobiotics.
ADVERTISEMENTS: In this article we will discuss about:- 1. Meaning of Stomata 2. Types of Stomata 3. Distribution 4. Daily Periodicity 5. Diffusive Capacity 6. Dynamic 7. Mechanism 8. Aspects of the Physiology of Stomatal Opening. Contents: Meaning of Stomata Types of Stomata Distribution of Stomata Daily Periodicity of Stomatal Movements Diffusive Capacity of Stomata […]
Meaning of Taxonomic Key: A key is a device, which when properly constructed and used, enables a user to identify an organism. Keys are devices consisting of a series of contrasting or contradictory statements or propositions requiring the identifier to make comparisons and decisions based on statements in the key as related to the material to be identified.
The terminal cell of the two-celled pro-embryo divides by longitudinal wall. (i) Crucifer type: Basal cell plays little or no role in the development of the embryo. (ii) Asterad type: Basal and terminal cells play an important role in the development of the embryo. II. The terminal cell of the two-celled proembryo divides by a transverse wall ...
