Fertilization
Biology ⇒ Reproduction and Development
Fertilization starts at 7 and continues till grade 12.
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A scientist observes that in a certain species, eggs are released into water and fertilized by sperm outside the body. What type of fertilization is this?
Describe the importance of timing in the process of fertilization.
Describe the process of double fertilization in flowering plants.
Describe the role of the zona pellucida in mammalian fertilization.
Describe the significance of the cortical reaction during fertilization.
Describe what happens to the egg after fertilization in mammals.
Explain the difference between internal and external fertilization, giving one example of each.
A scientist observes that in a certain species, eggs are released into water and fertilized by sperm outside the body. What type of fertilization is this?
Which event occurs first during fertilization?
(1) Fusion of nuclei
(2) Sperm binding to the egg membrane
(3) Cortical reaction
(4) Zygote formation
Which of the following animals exhibits external fertilization?
(1) Dog
(2) Fish
(3) Cow
(4) Cat
Which of the following best describes the site of fertilization in human beings?
(1) Uterus
(2) Fallopian tube
(3) Ovary
(4) Cervix
Which of the following best explains why genetic variation occurs as a result of fertilization?
(1) Only one parent contributes genetic material
(2) Random fusion of gametes
(3) No crossing over during meiosis
(4) Identical gametes fuse
Fertilization restores the _______ number of chromosomes in the zygote.
Fill in the blank: In double fertilization, one sperm fertilizes the egg and the other fuses with the _______ nuclei.
Fill in the blank: The fusion of gametes from the same individual is called _______ fertilization.
Fill in the blank: The process by which the sperm is attracted towards the egg is called _______.
True or False: Fertilization always occurs inside the female body in all animals.
True or False: Fertilization can occur if the sperm and egg are from different species.
True or False: In most mammals, only one sperm fertilizes an egg.
True or False: In plants, fertilization always results in fruit formation.
