How are internal and external fertilization similar?
Similarities Between Internal and External Fertilization Both internal and external fertilization occurs in animals as well as plants. Mobile sperms and immobile egg cells are produced in both internal and external fertilization. The final result of both internal and external fertilization is the zygote.
What is external and internal fertilization with examples?
Complete answer: Internal fertilization is the process when the syngamy (union of male and female gamete) occurs inside the female body after insemination using copulation. In contrast, External fertilization is the syngamy outside the female body, that is in the outer environment especially in water bodies.
What are 3 examples of external fertilization?
Descriptive external fertilization examples are that of salmon, trout fish, and codfish. Both the female and male release their eggs and sperms respectively into the water where they diffuse and fertilize. In the list of external fertilization examples, aquatic animals such as mammals and sharks are exceptions.
What are some examples of internal and external stimuli?
Stimuli can be external or internal. An example of external stimuli is your body responding to a medicine. An example of internal stimuli is your vital signs changing due to a change in the body.
Is butterfly internal or external fertilization?
Coupling: Butterflies mate on the ground or in the air; internal fertilization of the eggs takes from a few seconds to many minutes or hours. During mating, the male transfers a sperm packet (called a spermatophore) into the female; these sperm will fertilize the female’s eggs.
Are birds internal or external fertilization?
internal fertilization
Birds re produce s exually and have internal fertilization. Mating is generally preceded by courtship. Birds’ amniotic eggs have hard shells and are laid in a nest. The eggs are usually incubated until they hatch.
What is internal fertilization write an example?
Internal fertilization is defined as the process of fertilization that occurs inside the body of the individual. The internal fertilization occurs when the male sperms enter the female reporductive tract. The internal fertilization occurs in mammals and reptiles.
What is an example of internal fertilization?
The life process of initiating the development of a new entity of its kind through the fusion of male and female gametes is known as fertilization….Difference Between Internal and External Fertilization.
| Internal Fertilization | External Fertilization |
|---|---|
| Examples | |
| Reptiles, Birds, Mammals, Tracheophytes, Pteridophytes | Algae, Fish, Amphibians |
What is an example of external stimulus?
External stimuli are factors outside of the body that are taken in by receptors and will lead to a response. Examples of external stimuli include temperature changes, vision, hearing, tasting, smelling, and even sunlight for plants.
What’s an example of an internal stimulus?
As the name implies, the internal stimulus comes from within the organism. For example one of the internal stimuli is hunger which is the sign of low energy in the body. It stimulates us to eat something to regain the needed energy.
Do frogs use external fertilization?
In most species of frogs, fertilization is external. The male frog grabs the female’s back and fertilizes the eggs as the female frog releases them (Figure 2.2B). Rana pipiens usually lays around 2500 eggs, while the bullfrog, Rana catesbiana, can lay as many as 20,000.
Is Chicken internal fertilization?
As with most bird species, roosters and hens don’t have external genitalia. Instead both partners procreate using an external orifice called a cloaca. When the cloacae are touched together, sperm is transferred into the female reproductive tract.
What animals fertilize externally?
Among vertebrates, external fertilization is most common in amphibians and fish. Invertebrates utilizing external fertilization are mostly benthic, sessile, or both, including animals such as coral, sea anemones, and tube-dwelling polychaetes. Benthic marine plants also use external fertilization to reproduce.
What are examples of an internal stimulus?
Internal stimuli are changes, experiences, or feelings that occur within someone. Examples include hunger, thirst, and emotional states. Internal stimuli are often contrasted with external stimuli, which are changes or experiences that occur outside.
What are some internal stimulus?
Internal stimuli are factors located inside the body that are detected and cause a response. Examples of internal stimuli are oxygen levels, blood sugar and pH levels, water levels, and internal temperature. If any of these conditions are too high or too low, the body will respond in a way to get back to homeostasis.
What is a external stimulus?
An External Stimulus is a stimulus that comes from. outside an organism. Examples: You feel cold so you put on a jacket. A snake lunges at a rabbit, so the rabbit runs away.
Do birds use external fertilization?
Birds reproduce by internal fertilization, during which the egg is fertilized inside the female. Like reptiles, birds have cloaca, or a single exit and entrance for sperm, eggs, and waste. The male brings his sperm to the female cloaca.
Is Dog internal or external fertilization?
Internal fertilization is when the eggs are kept within the reproductive tract of the female, but when a the males sperm is inserted the egg gets fertilized inside the female. This occurs most often in land-based animals. Examples include worms, cats, dogs, birds, mammals, squid, arthropods, sharks and reptiles.
Is frog internal or external fertilization?
external
In most species of frogs, fertilization is external. The male frog grabs the female’s back and fertilizes the eggs as the female frog releases them (Figure 2.2B). Rana pipiens usually lays around 2500 eggs, while the bullfrog, Rana catesbiana, can lay as many as 20,000.
What is the example of internal fertilization?
Difference Between Internal and External Fertilization
| Internal Fertilization | External Fertilization |
|---|---|
| Examples | |
| Reptiles, Birds, Mammals, Tracheophytes, Pteridophytes | Algae, Fish, Amphibians |