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28 Cards in this Set

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______ cells reproduce exact copies of themselves.
Body cells
Why is it important for body cells to reproduce exact copies of themselves?
So that new cells will continue to perform the same function as the old cells.
What organelle tells the cell when to divide and make a new cell?
the nucleus
Chromosomes are made up of ____, a chemical code that determines the shape and function of a cell.
DNA
Chromosomes determine:
1)
2)
1)shape and function of the cell, and
2)when the cell will divide
The process of a cell dividing and creating an exact duplicate of itself is called __________.
mitosis
What happens in the nucleus before the cell divides?
The chromosomes make an exact copy of themselves.
_____________ is tissue replacement that is possible through mitosis.
regeneration
What type of flatworm can regenerate most of its body?
planaria
Organisms that reproduce by simple cell division is called ________.
fission
Reproduction that does not require a male and female cell is called _______.
asexual reproduction
Yeast reproduces asexually in a process called ____.
budding
When a female cell and male cell join, a ______ is formed.
zygote
Nearly all human body cells have _____ chromosomes.
46 chromosomes
The human body produces reproductive cells that contain only ____ chromosomes each.
23 chromosomes
_______ is the process that reduces the number of chromosomes in reproductive cells.
meiosis
A ______ cell is a reproductive cell with only 23 chromosomes; half the number of chromosomes of the body cell.
gamete
Name the three ways organisms begin life:
1) 2) 3)
1)born alive
2)hatch
3)sprout
When an organism reaches its final form and size, it is an ______.
adult
Organisms that grow larger, but keep their same body features are examples of ____ _________.
direct development
What is a life cycle?
The stages that make up an organism's life.
When an organism's body changes shape or characteristics as it matures, it goes through ___.
metamorphosis
Name three insects that go through metamorphosis:
1) 2) 3)
1.beetles
2.butterflies
3.grasshoppers
Complete metamorphosis has ___ stages while incomplete metamorphosis has ____ stages.
4 stages

3 stages
Name the three stages of incomplete metamorphosis:
1 2 3
1) egg
2) nymph
3) adult
_____ is the shedding of the outer skeleton.
molting
Name the four stages of complete metamorphosis:
1 2 3 4
1)egg
2)larva
3)pupa
4)adult
In what stage of metamorphosis does the insect neither eat nor move.
pupa