North Carolina Science Grade 7

Chapter 4: Cell Reproduction

Cell Reproduction

1.
The cell that is formed when fertilization occurs is called __________.
A)a mutation
B)a ladder
C)a zygote
D)a cytoplasm
2.
How many chromosomes are in a human kidney cell?
A)23
B)8
C)1
D)46
3.
When a mistake happens in the process of copying DNA, the result is called __________.
A)a nucleus
B)a zygote
C)a mutation
D)a chromosome
4.
Which of these is a possible outcome of a mistake in meiosis?
A)An organism might change species.
B)An organism might not be able to regenerate part of its body.
C)An organism will produce multiple offspring at one time.
D)An organism might not grow normally.
5.
A sea star has one of its arms break off. That arm grows into its own separate organism through __________.
A)spindle fibers
B)regeneration
C)sexual reproduction
D)chromosomes
6.
Which of these is part of asexual reproduction?
A)egg
B)sperm
C)zygote
D)regeneration
7.
How many chromosomes are in human sex cells?
A)23
B)46
C)1
D)8
8.
Which of these is a part of sexual reproduction?
A)fission
B)zygote
C)regeneration
D)budding cells
9.
The process of meiosis ensures that organisms will have __________.
A)a different haploid number than its parents have
B)the ability to reproduce by budding
C)different numbers of chromosomes than its parents have
D)the same diploid number as its parents have
10.
During prophase, the two centrioles __________.
A)turn into chromosomes
B)help plant cells develop
C)move to opposite ends of the cell
D)disintegrate during the process
11.
Hydra reproduce through __________, where the offspring grows from the body of the parent organism.
A)mutations
B)DNA
C)budding
D)thymine
12.
__________ is a base found in RNA but not in DNA.
A)Uracil
B)Adenine
C)Cytoplasm
D)Mitosis
13.
DNA code is __________ before being passed to new cells.
A)regenerated
B)copied
C)destroyed
D)doubled
14.
What can fission be used to do?
A)meiosis
B)cell cycles
C)sexual reproduction
D)asexual reproduction
15.
A male tiger contributes sperm to a females tiger's egg to produce a zygote. The process that produces haploid sex cells is __________.
A)interphase
B)fission
C)mitosis
D)meiosis
16.
The final step in the mitosis process for animal cells is _________.
A)telophase
B)chromosomes
C)interphase
D)centrioles
17.
If a diploid tomato cell has 24 chromosomes, how many chromosomes will the tomato's sex cells have?
A)12
B)48
C)24
D)6
18.
Of the two types of cells made by the human body, the majority of those cells are __________.
A)incomplete cells
B)sex cells
C)budding cells
D)body cells
19.
The four nitrogen bases that are found in DNA are adenine, guanine, thymine, and _________.
A)centriole
B)chromatid
C)cytoplasm
D)cytosine
20.
Suppose an animal with 38 diploid chromosomes is able to produce offspring with an animal that has 60 diploid chromosomes. How many diploid number of chromosomes would the offspring receive from each parent?
A)19 and 30
B)19 and 60
C)76 and 120
D)38 and 30
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