Download Key Concepts Select the term that best completes the

Name: _______________________________________________
Date: __________
Key Concepts
Select the term that best completes the statement.
A.
B.
C.
D.
E.
F.
G.
H.
cell division
chromosomes
cells
divides
centromere
DNA
chromatids
nucleus
____ 1. _______ is the chemical code that contains information for an organism's growth, repair, and
development.
____ 2. In eukaryotic cells, DNA is contained in the _______.
____ 3. DNA molecules are formed into structures called _______.
____ 4. A duplicated chromosome consists of two matching _______.
____ 5. When a multicellular organism is cut, the injury is repaired through the process of _______.
____ 6. According to the cell theory, all cells come from existing _______.
Extended Response
Answer the following question on the back of this paper or on a separate sheet of paper.
7. Describe three functions of cell division in your body.
Key Concepts
Select the term that best completes the statement.
A.
B.
C.
D.
E.
F.
G.
H.
anaphase
metaphase
cell cycle
mitosis
cytokinesis
prophase
interphase
telophase
____ 8. The two main phases of the _______ include normal cell function and cell division.
____ 9. _______ is the process of cell division that ensures daughter cells will get exact copies of parent DNA.
____ 10. Chromatids migrate to opposite sides of a cell during _______.
____ 11. Chromosomes line up in the middle of a cell during _______.
____ 12. A new membrane forms around each group of chromosomes during _______.
____ 13. Long strands of DNA condense during _______.
____ 14. _______ is the division of a cell's cytoplasm that occurs right after mitosis.
LS_C2-quizzes, Version: 1
1
____ 15. During _______, the cell duplicates its DNA and begins to prepare for cell division.
Extended Response
Answer the following question on the back of this paper or on a separate sheet of paper.
16. Draw pictures of an animal cell with four chromosomes during metaphase, interphase, and cytokinesis.
In your drawing, label the nucleus, chromosomes, and chromatids where appropriate.
Key Concepts
Choose the letter of the best answer.
____ 17. Most unicellular organisms produce offspring by
A. asexual reproduction
B. sexual reproduction
C. cellular respiration
D. regenerating body parts
____ 18. A hydra offspring
A. can reproduce sexually
B. has about half of its parent's DNA
C. is genetically identical to its parent
D. can reproduce by binary fission
____ 19. One advantage of asexual reproduction is that
A. it occurs slowly
B. organisms can easily find mates
C. it requires at least two organisms
D. large populations can develop in a short time
____ 20. Why might an open cut become infected within hours?
A. Most bacteria produce genetically different offspring.
B. Most bacteria reproduce very rapidly.
C. Most bacteria reproduce by budding.
D. Most bacteria can regenerate.
Extended Response
Answer the following question on the back of this paper or on a separate sheet of paper.
21. Write a short paragraph to compare and contrast regeneration in humans, plants, and sea stars.
LS_C2-quizzes, Version: 1
2
Answer Key
1. F. DNA
2. H. nucleus
3. B. chromosomes
4. G. chromatids
5. A. cell division
6. C. cells
7. 4 pointsfor a response that correctly describes the three functions of cell division
Sample: Cell division is needed for growth. As cell division increases the number of cells in the body, the
body grows. Cell division is also responsible for replacing worn-out cells or cells that have been lost as a
result of an injury. Cell division is also involved in the development of tissues, organs, and organ systems.
As cells in your body divide, many of them become specialized to perform particular functions. Specialized
cells cluster together to form tissues, tissues form organs, and organs are organized into organ systems.
3 points:correctly describes two functions of cell division
2 points:correctly describes one function of cell division
1 point:correctly states, but does not describe, any of the functions of cell division
8. C. cell cycle
9. D. mitosis
10.
A. anaphase
11.
B. metaphase
12.
H. telophase
13.
F. prophase
14.
E. cytokinesis
15.
G. interphase
16.
4 pointsfor a response that includes three correct, appropriately labeled drawings
Sample: Students' drawings should resemble those in the student edition. The cell in interphase should
show uncondensed DNA in the nucleus. The cell in metaphase should show four chromosomes, each
consisting of two chromatids joined by a centromere, lined up in the middle of the cell. The cell undergoing
cytokinesis should include two nuclei with uncondensed DNA. The cell is being pinched off in the middle
as it forms two daughter cells.
3 points:correctly draws and appropriately labels two drawings
2 points:correctly draws and appropriately labels one drawing
1 point:partially draws and labels one drawing
17.
A. asexual reproduction
18.
C. is genetically identical to its parent
19.
D. large populations can develop in a short time
20.
B. Most bacteria reproduce very rapidly.
LS_C2-quizzes, Version: 1
3
21.
4 points for a response that correctly compares and contrasts regeneration in all three organisms
Sample: In all three organisms, regeneration involves the growth and development of new cells through
cell division. In sea stars and plants, regeneration is not only used to repair damaged tissue, it is also a
method of asexual reproduction. When a some types of sea stars lose a body part, the original organism
can regenerate the lost part. The lost body part can also regenerate the parts it is missing to create a new
sea star. This new organism is genetically identical to the original sea star. Likewise, when a leaf or stem
cutting regenerates the missing parts of a plant, asexual reproduction is occurring. The new plant is
genetically identical to the plant from which the cutting was taken. In contrast, humans can use
regeneration to repair damaged tissue, but not to reproduce asexually.
3 points: compares and contrasts regeneration in two organisms
2 points: compares or contrasts regeneration in three organisms
1 point: defines regeneration, but does not compare or contrast the process in different organisms
LS_C2-quizzes, Version: 1
4
Standards Summary
CA 7.2.e
Students know DNA (deoxyribonucleic acid) is the genetic material of
living organisms and is located in the chromosomes of each cell.
CA 7.1.c
Students know the nucleus is the repository for genetic information in
plant and animal cells.
CA 7.1.e
Students know cells divide to increase their numbers through a
process of mitosis, which results in two daughter cells with identical
sets of chromosomes.
CA 7.2.a
Students know the differences between the life cycles and
reproduction methods of sexual and asexual organisms.
LS_C2-quizzes, Version: 1
5