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Ch.3 Science Test
Unit A Chapter 3 Test Review
Question | Answer |
---|---|
the process of cell division | mitosis |
reproduction by simple cell division | asexual reproduction |
all the stages of an organism's life | life cycle |
the form of reproduction in which cells from two parents unite to form a zygote | sexual reproduction |
a threadlike strand of DNA inside the nucleus | chromosomes |
a kind of growth where organisms keep the same body features as they grow larger | direct development |
the process that reduces the number of chromosomes in reproductive cells | meiosis |
a change in the shape characteristics of an organism's body as it grows and matures | metamorphosis |
a characteristic that is passed from parent to offspring | inherited traits |
structures on a chromosome that contain DNA code for a trait an organism inherits | genes |
a strong trait | dominant trait |
a weak trait | recessive trait |
tissue replacement (starfish, lizard tail, planaria, wound healing) | regeneration |
nucleus makes exact copy of chromosomes | preparing for mitosis |
a cell has enough DNA for two cells | before mitosis begins |
each chromosome separates from its copy | during mitosis |
two groups of chromosomes pull apart and cell membrane pinches in at the middle, forming two new cells | end of mitosis |
cells from two parents unite to form one cell | zygote |
spiders and earthworms | direct development |
beetles, butterflies, and grasshoppers | metamorphosis |
cockroaches and grasshoppers | incomplete metamorphosis |
egg, nymph, adult | incomplete metamorphosis |
shedding outer skins as they grow | molting |
egg, larva, pupa, adult | complete metamorphosis |
always occupy the same place on a chromosome for a particular trait | genes |