Fertilization
Biology ⇒ Reproduction and Development
Fertilization starts at 7 and continues till grade 12.
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After fertilization, what process leads to the development of an embryo?
Describe one way in which fertilization in plants differs from fertilization in animals.
Describe the main difference between internal and external fertilization.
Describe what happens to the zygote after fertilization in animals.
Explain why external fertilization is more common in aquatic animals.
Explain why fertilization is important for genetic diversity.
Explain why only one sperm usually fertilizes an egg.
In a certain species of frog, fertilization occurs in water and many eggs are released at once. What type of fertilization is this, and why is it advantageous for the species?
Which of the following best describes external fertilization? (1) Fertilization occurs inside the female body (2) Fertilization occurs outside the female body (3) Fertilization occurs in the male body (4) Fertilization does not require gametes
Which of the following best explains why many aquatic animals release large numbers of gametes during external fertilization? (1) To increase the chance of fertilization (2) To reduce competition (3) To save energy (4) To avoid predators
Which of the following is a direct result of fertilization? (1) Gamete formation (2) Embryo development (3) Zygote formation (4) Birth of offspring
Which of the following is a disadvantage of external fertilization? (1) High risk of gamete loss (2) High protection for zygote (3) Fewer gametes needed (4) Occurs inside the body
Fill in the blank: In animals, the process of fertilization ensures __________ variation in the offspring.
Fill in the blank: In flowering plants, the pollen tube grows towards the __________ to deliver the sperm cells.
Fill in the blank: In humans, the sperm cell carries the __________ chromosome that determines the sex of the offspring.
Fill in the blank: The process by which the zygote divides to form a multicellular organism is called __________.
True or False: Fertilization always results in the formation of a zygote.
True or False: In flowering plants, fertilization leads to the formation of seeds.
True or False: In mammals, fertilization usually occurs in the uterus.
True or False: The zygote formed after fertilization is genetically identical to both parents.
