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_____21. what process is talking place when an egg cell units with sperm cell to form a zygote? A. fertilization B. fragmentation C. pollination D. vegetative propagation _____22. which species can produce offspring that are genetically different from their parents? A. a species that has a few variations B. a species that reproduce sexually C. a species that produce asexually D. a species that complete with a similar species _____23. which is NOT characteristic of sexual reproduction? A. Gametates Frome two parents unite to form a zygote B. offspring are genetically identical with the parents C. offspring are different from their parents and siblings D. genetic variability of offspring helps to ensure survival in changing environmental conditions _____24. which of the following species undergo regeneration EXCEPT? A. starfish B. salamander C. lizard D. hydra _____25. which of the following is considered as a biotic component of ecosystem? A. food B. sunlight C. temperature D. wildlife ______26. A. butterflies B. flowers C. moses D. waterfalls _____27. which of the following examples show mutual relationship? A. beef feeding on nectar of a flower B. bird making its nest on the branch of a tree C. yellow light can attach itself on the bark of a D. mushroom living on a fence _____28. in which type of relationship do organisms complete for survival? A. competition B. mutualism C. parasitism D. predation _____29. which of the following describes parasitism? A. affirm plant growing on a trunk of a tree B. barnacle sticking on the shelf an oyster C. an orchid living on a trunk of a narra tree D. an insect larvae staying on the leaves of a plant. _____30. which of the following TRUE about predation? A. but organisms are harmed B. but organism are benefited C. one organism are benefited while the other is harmed D. one organism is benefited while the other is unaffected
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