Focus On Life Science: California Grade 7

Chapter 2: From a Cell to an Organism

Standards Review

1.
During what phase of the cell cycle does a cell prepare to reproduce? 1.e
A)anaphase
B)interphase
C)metaphase
D)prophase
2.
____________ is the process in which cytoplasm divides. 1.e
A)Mitosis
B)Meiosis
C)Cytokinesis
D)Plasmosis
3.
The human has ______ homologous chromosomes. 1.e
A)23 pairs
B)46 pairs
C)billions of
D)many hundreds of
4.
What are the copies of a chromosome made during S phase called? 1.e
A)sister chromatids
B)centromeres
C)daughter genes
D)homologous
5.
During which part of interphase does organelle reproduction occur? 1.e, 1.f
A)G3
B)G1
C)S
D)G2
6.
Which cell organelle has its own DNA and can duplicate itself? 1.c
A)ribosome
B)cell membrane
C)cytoplasm
D)mitochondria
7.
In which phase does a new membrane form around each set of chromosomes? 1.e
A)metaphase
B)anaphase
C)telophase
D)prophase
8.
Which event occurs during prophase? 1.e
A)The chromosomes move to the middle of the cell.
B)The DNA that make up a replicated chromosome twists into tight coils.
C)The sister chromatids begin to separate.
D)A membrane forms around each set of chromosomes.
9.
Which describes cytokinesis in an animal cell? 1.e
A)The cell membrane pinches inward.
B)A cell plate forms between the two nuclei.
C)The new cell wall is built by molecules released from the cell membrane.
D)The chromosomes align at the middle of the cell.
10.
_____________ are single-celled organisms that do not have membrane-bound organelles. 5.a
A)Eukaryotes
B)Prokaryotes
C)Amoebas
D)Protists
11.
Brain cells and nerve cells are _________ to enable them to send and receive signals from many directions. 1.f
A)striated
B)round
C)smooth
D)branched
12.
Which cells remain undifferentiated? 1.f
A)cardiac cells
B)blood cells
C)stem cells
D)liver cells
13.
Of organ system, organ, tissue, and organism, which is the most basic? 1.f
A)organ
B)tissue
C)organ system
D)organism
14.
Which is NOT part of your nervous system? 1.f
A)liver
B)brain
C)sensory receptors
D)spinal cord
15.
Which organ is part of your lymphatic system? 1.f
A)spleen
B)heart
C)kidney
D)lungs
Grade 7
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