Lesson Overview
Cell Growth, Division, and Reproduction
Lesson Overview
Cell Growth, Division, and Reproduction
Limits to Cell Size
What are some of the difficulties a cell faces as it increases in size?
Reproduction
Cell Growth, Division, and
Reproduction
The _________ a cell becomes, the more demands the cell
places on its ____. In addition, a ________ cell is less
________ in _________ nutrients and waste materials
_______ its cell __________.
1. When a living thing grows, what
happens to its cells?
2. What is there about growth that
requires cells to divide and
reproduce themselves?
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Lesson Overview
Cell Growth, Division, and Reproduction
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Lesson Overview
Information “Overload”
Cell Growth, Division, and Reproduction
Information “Overload”
Describe the library
analogy given to explain
information overload.
Living cells store critical information in ______.
As a cell grows, that information is used to _________ the
______________needed for cell growth.
As size ___________, the demands on that information ______as
well. If a cell were to grow without limit, an “_____________
______________” would occur.
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Lesson Overview
Cell Growth, Division, and Reproduction
Lesson Overview
Exchanging Materials
Cell Growth, Division, and Reproduction
Traffic Problems
Food, oxygen, and water enter a cell through the _______
_______________. __________ products leave in the same way.
Describe the traffic analogy to
explain what happens when the
volume of a cell (size) increases
faster than its surface area.
The ________ at which this ______________takes place depends
on the ______________ _________ of a cell.
The _________ at which _________ and oxygen are used up and
___________ products are produced depends on the cell’s
______________.
The ratio of surface area to volume is key to understanding why
cells must divide as they grow.
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Lesson Overview
Cell Growth, Division, and Reproduction
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Lesson Overview
Division of the Cell
Cell Growth, Division, and Reproduction
Cell Division and Reproduction
Before a cell grows _____ ________, it __________ into
____ new “daughter” cells in a process called _____
____________.
__________ cell division, the cell ________ all of its _______.
It then divides into two “daughter” cells. ______ daughter cell
receives a _______________ _____ of ______.
•
How do ____________ and ____________ reproduction compare?
•
The production of _____________ _____________ offspring from a
________ parent is known as __________ reproduction.
•
Offspring produced by __________ reproduction __________ some of
their ___________ information (_____) from ______ parent.
(sketch a picture to demonstrate both types of reproduction)
Why do cells divide, instead of just growing larger and
larger and larger?
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Lesson Overview
Cell Growth, Division, and Reproduction
Lesson Overview
Cell Growth, Division, and Reproduction
Asexual Reproduction
Asexual Reproduction
In _________________ organisms, cell division leads to
__________. It also enables an organism to _________
and _____________ its body.
In _________________ organisms, cell division is a form
of __________________.
______________ reproduction is reproduction that involves a __________
parent producing an _____________. The offspring produced are
genetically ______________ to the single cell that produced them.
Asexual reproduction is a ___________, ____________, and effective
way for an organism to produce a ____________________________.
Both ___________________ and ___________________ single-celled
organisms and many _________________ organisms can reproduce
_______________.
List some examples of organisms that reproduce asexually.
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Lesson Overview
Cell Growth, Division, and Reproduction
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Lesson Overview
Cell Growth, Division, and Reproduction
Article:“WhyDoWeHaveSex?”
Sexual Reproduction
In _____________ reproduction, offspring are produced by the _______ of
_____ sex cells – one from each of two parents. These ______ into a
_________ cell before the offspring can grow.
The __________ produced __________ some genetic information (_____)
from ________ parents.
______ animals and ________, and many single-celled organisms,
reproduce ______________.
Make a T-chart that compares and contrasts asexual and sexual
reproduction.
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• Previewthefollowingquestions.
• Skimthetexttogetthemainideaofthewholearticle.
• Re-readthetextandwritea3-4wordsummaryofthekeypoint
nexttoeachparagraph.
• Carefullyre-readtocitetextualevidenceinyourthoroughand
correctwrittenresponses.
COMPLTERESPONSESSHOULDINCLUDEATLEAST4-5SENTENCES
FOREACH.
1. Describethelimitationsofasexualreproduction.
2. Explainwhymalesexist,intermsoftheRedQueen
hypothesis.
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