Sexual Reproduction in Animals
Biology ⇒ Reproduction and Development
Sexual Reproduction in Animals starts at 7 and continues till grade 12.
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Describe the difference between oviparous, viviparous, and ovoviviparous animals.
Describe the main differences between internal and external fertilization in animals.
Describe the process of fertilization in sea urchins, including the role of the acrosomal reaction.
Describe the process of implantation in mammals.
Explain the role of hormones in regulating the menstrual cycle in female mammals.
Explain the role of the epididymis in the male reproductive system.
A certain species of reptile exhibits temperature-dependent sex determination, where the temperature at which eggs are incubated determines the sex of the offspring. Explain how this mechanism can impact population dynamics in the context of climate change.
A researcher observes a population of fish in which some individuals are able to change sex during their lifetime. What is this phenomenon called, and what is its significance in sexual reproduction?
Which of the following animals exhibit external fertilization?
(1) Frogs
(2) Dogs
(3) Birds
(4) Cows
Which of the following animals is hermaphroditic?
(1) Earthworm
(2) Dog
(3) Cat
(4) Cow
Which of the following best describes parthenogenesis?
(1) Development of an embryo from an unfertilized egg
(2) Fusion of two sperm cells
(3) Self-fertilization in hermaphrodites
(4) Asexual reproduction by budding
Which of the following best explains why sexual reproduction is advantageous in changing environments?
(1) It produces clones
(2) It increases genetic diversity
(3) It is faster than asexual reproduction
(4) It requires only one parent
Fill in the blank: The female gamete in animals is called the __________.
Fill in the blank: The fusion of the nuclei of male and female gametes is called __________.
Fill in the blank: The process by which a sperm cell penetrates an egg and their nuclei fuse is called __________.
Fill in the blank: The structure that connects the developing embryo to the placenta in mammals is the __________ cord.
Oviparous animals lay eggs, while viviparous animals give birth to live young. True or False?
True or False: All animals that reproduce sexually have separate sexes (male and female).
True or False: Cross-fertilization always results in greater genetic diversity than self-fertilization.
True or False: External fertilization is more common in aquatic animals than in terrestrial animals.
