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28 Cards in this Set
- Front
- Back
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______ cells reproduce exact copies of themselves.
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Body cells
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Why is it important for body cells to reproduce exact copies of themselves?
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So that new cells will continue to perform the same function as the old cells.
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What organelle tells the cell when to divide and make a new cell?
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the nucleus
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Chromosomes are made up of ____, a chemical code that determines the shape and function of a cell.
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DNA
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Chromosomes determine:
1) 2) |
1)shape and function of the cell, and
2)when the cell will divide |
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The process of a cell dividing and creating an exact duplicate of itself is called __________.
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mitosis
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What happens in the nucleus before the cell divides?
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The chromosomes make an exact copy of themselves.
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_____________ is tissue replacement that is possible through mitosis.
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regeneration
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What type of flatworm can regenerate most of its body?
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planaria
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Organisms that reproduce by simple cell division is called ________.
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fission
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Reproduction that does not require a male and female cell is called _______.
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asexual reproduction
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Yeast reproduces asexually in a process called ____.
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budding
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When a female cell and male cell join, a ______ is formed.
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zygote
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Nearly all human body cells have _____ chromosomes.
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46 chromosomes
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The human body produces reproductive cells that contain only ____ chromosomes each.
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23 chromosomes
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_______ is the process that reduces the number of chromosomes in reproductive cells.
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meiosis
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A ______ cell is a reproductive cell with only 23 chromosomes; half the number of chromosomes of the body cell.
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gamete
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Name the three ways organisms begin life:
1) 2) 3) |
1)born alive
2)hatch 3)sprout |
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When an organism reaches its final form and size, it is an ______.
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adult
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Organisms that grow larger, but keep their same body features are examples of ____ _________.
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direct development
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What is a life cycle?
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The stages that make up an organism's life.
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When an organism's body changes shape or characteristics as it matures, it goes through ___.
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metamorphosis
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Name three insects that go through metamorphosis:
1) 2) 3) |
1.beetles
2.butterflies 3.grasshoppers |
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Complete metamorphosis has ___ stages while incomplete metamorphosis has ____ stages.
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4 stages
3 stages |
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Name the three stages of incomplete metamorphosis:
1 2 3 |
1) egg
2) nymph 3) adult |
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_____ is the shedding of the outer skeleton.
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molting
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Name the four stages of complete metamorphosis:
1 2 3 4 |
1)egg
2)larva 3)pupa 4)adult |
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In what stage of metamorphosis does the insect neither eat nor move.
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pupa
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