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Questions and Answers
Where does external fertilization typically occur in animals?
Where does external fertilization typically occur in animals?
Which animals are classified as oviparous?
Which animals are classified as oviparous?
What is the first cell of a new organism called?
What is the first cell of a new organism called?
When does gestation occur in animals?
When does gestation occur in animals?
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What is the process called when a mother gives birth to young ones?
What is the process called when a mother gives birth to young ones?
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Which animals are involved in internal fertilization?
Which animals are involved in internal fertilization?
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What is the most vital event that takes place in sexual reproduction in animals?
What is the most vital event that takes place in sexual reproduction in animals?
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Which type of reproduction involves offspring arising from a single parent?
Which type of reproduction involves offspring arising from a single parent?
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What is the main difference between external fertilization and internal fertilization?
What is the main difference between external fertilization and internal fertilization?
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Which process results in an offspring that is genetically a twin of the parent?
Which process results in an offspring that is genetically a twin of the parent?
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In which type of reproduction does not involve a fusion of two types of gametes?
In which type of reproduction does not involve a fusion of two types of gametes?
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What is the defining characteristic of asexual reproduction?
What is the defining characteristic of asexual reproduction?
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Study Notes
Cellular Reproduction
- Yeast cells reproduce through budding, where a daughter cell is formed that is genetically identical to the mother cell but not similar in size.
- The daughter cell can detach from the mother cell and mature into a new individual.
Viviparous and Oviparous Animals
- Viviparous animals give birth to young ones, while oviparous animals lay eggs that develop outside their bodies.
- Examples of oviparous animals include chickens, ducks, lizards, crocodiles, snakes, turtles, and fish.
- External fertilization occurs in oviparous animals, where the development of the young occurs outside the female's body.
Fertilization and Development
- In some animals, like seahorses, the female lays eggs in the male's brood pouch, where they are fertilized.
- Internal fertilization occurs in animals like dogs and cats, where the male gamete (sperm) is placed inside the female's body.
- Fertilization combines genetic material from both parents, resulting in a genetically unique zygote.
Sexual Reproduction
- Most animals are dioecious, with separate male and female sexes, producing sperm and eggs respectively.
- Sexual reproduction in animals begins with fertilization, involving two sexes/gametes.
- The zygote grows into an embryo, which develops into a new individual.
Asexual Reproduction
- Asexual reproduction involves a single parent, without fusion of gametes or meiosis.
- Offspring are genetically identical to the parent and are clones.
- Asexual reproduction is common in single-celled organisms, prokaryotes, and some multicellular eukaryotes.
- Binary fission and budding are two common asexual reproduction methods shown by organisms.
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Description
Explore the fundamental concepts of animal reproduction, including asexual and sexual reproduction, fertilization, and the formation of a zygote from two different gametes. Learn about the vital process that leads to the creation of offspring.
