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I. Multiple Choice. Pick out the letter of the correct answer. Write it on a piece of paper or in your Science notebook. 1. When the sperm cell and egg cell are joined together to form a unit, it is called c. reproduction a. embryo b. fertilization d. zygote 2. Another term used for sex cells is a. embryo c ovary b. gametes d. zygotes 3. The time between the laying of egg until its hatching of the new one is called a, incubation b. gestation c. pregnancy d. sexual 4. The following statements are true with oviparous animals except one. a. They undergo incubation period. b. They are born as live young animal. c. The developing embryo within an egg gets nourishment from its yolk. d. They lay their eggs and continue their development until hatching period. 5. Which is correct about asexual reproduction? a. The ovary produces egg cells. b. No sex cell is needed to form a new organism. c. Sex cells from male and female animals are needed d. The embryo is soon developed as a young individual. 6. The developed zygote is called a. embryo b. gametes c ovary d. testis 7. Which animal undergoes external fertilization? a. cat d. lion b. cow c. fish
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