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March 22, 2017 Aims:
SWBAT explain that the reproduction is necessary for the
continuation of all species.
SWBAT compare and contrast the processes of sexual and
asexual reproduction.
Agenda
1. Do Now
2. Class Notes
3. Guided Practice
4. Independent Practice
5. Practicing our AIMS:
G.1-Reproduction I
How will you help our class earn all of our S.T.R.I.V.E. Points?
“You have a
choice. Just
remember,
whatever you
chose has natural
consequenses.”
This is a BEASTIE unit!
Stay on top of HW!
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OBJECTIVES: By the end of class, students will be able to…
SWBAT explain that the reproduction is necessary for the continuation of all species.
SWBAT compare and contrast the processes of sexual and asexual reproduction.
DO NOW
Is it possible to be born with the DNA of only one parent?
___________________________________________
___________________________________________
___________________________________________
___________________________________________
CONCEPT REVIEW Two positively charged particles are attached to springs. A metal sphere is placed near each charged
particle, as shown in the diagram.
Positive charge is slowly added to Sphere A. An equal amount of negative charge is slowly added to
Sphere B. Assume the two systems are isolated from each other.
Describe how each of the springs will change in shape. (2 pts)
SCIENCE 8 Reproduction I
G.1
Name: _____________________________
Date: ________________________________
Homeroom: _________________________
Heredity
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CLASS NOTES
REPRODUCTION:
o In biology, organisms can reproduce by
o Reproduction is necessary for a species
Many organisms have ____________________________ offspring.
This ensures that at least a handful of the __________________ will survive and
____________________.
Example 1:
Spiders have around ___________________________________________.
Only a handful of these ___________________________ will survive and reproduce to make a new
__________________________.
Example 2:
Humans will only have ____________________________ offspring.
Since they only have a few offspring, they will put a lot of _____________ into raising their offspring.
IN THE REAL WORLD
What is this graph representing?
____________________________________________________________________________________
Is this population increasing or decreasing? ________________________
In order for the population to stabilize how many children does each couple need to
have? _________________ __
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CREATING OFFSPRING
Type of Reproduction Sexual Reproduction Asexual Reproduction
Parents required
Amount of DNA from each
parent.
Examples of individuals that reproduce :
Hydra: 9th grade notes:
Mold Spores: 9th grade notes:
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Examples of individuals that reproduce :
Plants: 9th grade notes:
Fish: 9th grade notes:
IN THE REAL WORLD
If an entire population of organisms is produced by asexual reproduction then they will
be genetically identical. Why might this be a disadvantage for the species?
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Type of Fertilization Internal External
Definition
Advantage
Disadvantage
Example
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INDEPENDENT PRACTICE
Directions: For each key term, explain the “big idea” to a kindergartener.
Then, draw a picture to illustrate the word.
Term Concept Picture
SEXUAL REPRODUCTION
ASEXUAL REPRODUCTION
INTERNAL REPRODUCTION
EXTERNAL REPRODUCTION
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1. Use the graph below to answer the following questions:
A. In 10 words or LESS what is this graph representing?
_____________________________________________________________________________________________
___________________________________________________
B. Is the population growing or declining? _____________________________
C. How do you know?
_____________________________________________________________________________________________
___________________________________________________
2. What advantage does a species that reproduces sexually have over a species that reproduces
asexually?
A. There is greater variation among the offspring.
B. The offspring are identical to the parents.
C. Only one parent is necessary for reproduction.
D. No sex cells are needed for reproduction.
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Directions: Use your knowledge of the reproduction discussed in class today and answer the following
question.
3. Variety of plant produces a small white fruit. Part of the stem of this plant was planted in a garden
and grew into an adult plant. What type of fruit would this plant most likely grow?
A. Large red fruit, only
B. Large whit fruit, only
C. Small red fruit, only
D. Small white and red fruit
Support your answer below in the box below:
4. Aphids are a common plant-pest insect. They alternate between asexual and sexual reproduction.
During the summer, aphid populations grow quickly by asexual reproduction.
As winter approaches, aphids switch to sexual reproduction.
What advantage does the switch to sexual reproduction give to the aphids?
Use your knowledge of reproduction types and your own logical reasoning to justify your answer.
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HIGH SCHOOL CHALLENGE
1. The diagrams below represent various processes associated with reproduction. Asexual
reproduction is represented by
A. Diagram A
B. Diagram B
C. Diagrams A and C
D. Diagram B and D
1. When a worm is cut in half, each half usually grows back into a complete worm over time. This
situation most closely resembles.
A. Sexual reproduction in which a mutation has occurred.
B. Sexual reproduction in which each half represents one parent.
C. Asexual reproduction of a single-celled organism.
D. Sexual reproduction of a single-celled organism.
2. A pattern of reproduction and growth in a one-celled organism is shown below.
Which statement best describes this pattern of reproduction?
A. All genetic material comes from one parent.
B. Only some of the genetic material comes from one parent.
C. The size of the parent determines the amount of genetic material.
D. The size of the parent determines the source of the genetic material.
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TRIMESTER THROWBACK!
1. A model of Earth’s internal structure is shown.
Analysis of which type of data led to the development of this
model?
A. seismic waves
B. sonar of the Earth’s oceans
C. radioactive deacy
D. planet differentation
2. Which type of wave can travel through solid, liquids and gases?
A. P-waves
B. S-waves
C. body waves
D. surface waves
3. The graph shows the seismic wave velocities at various depths
within Earth.
Based on the graph, which point marks the beginning of
Earth’s liquid outer core?
A. Point A
B. Point B
C. Point C
D. Point D
4. The shadow zone is the area of Earth that does not receive direct seimic wves during an
earthquake.
This zone is evidence that:
A. the outer core is liquid.
B. the outer core is composed of iron and nickel oxides.
C. the inner core is solid.
D. it is very hot near the core.
5. Select three seismic waves behaviors that occur when the waves pass across the boundary
between two different materials,
A. the waves refract
B. the waves change in velocity
C. the waves come to complete stop
D. the waves reflect
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Science 8
G.1:
Reproduction I
Name: _____________________________
Date: _______________________________
Homeroom: _________________________
Quick Notes:
SKILL SNAPSHOT
Like A Scholar?
Yes No
Redo?
Yes No
Directions: Support your selection by jotting down your reasoning.
Question Reasoning
1. In order for a species to continue on into the
next generation it must be able to
A. eat
B. find a shelter
C. reproduce
D. make friends
The diagram to the side illustrates
asexual reproduction in bacteria
2. Bacteria reproduce offspring
that usually have
A. Genes that are different from those of the
parent
B. Genes that are identical to those of the
parent
C. Half of the genetic information
D. Organelles that are not found in the parent
3. A female fish lays her eggs on the bottom of a
shallow pond and another male fish fertilizes
them after the female fish laid her eggs. This is an
example of
A. Internal fertilization
B. Regular fertilization
C. External fertilization
D. External and internal fertilization
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4. Paramecia usually reproduce asexually. Fish reproduce sexually. Both organisms live in the same
environment. Suppose the environmental conditions in the lagoon the organisms live in together
changed.
What advantage will the fish population have over the paramecium population?
CONCEPT REVIEW
5. Two positively charged particles are attached to springs. A metal sphere is placed near each
charged particle, as shown in the diagram.
Positive charge is slowly added to Sphere A. An equeal amount of negative charge is slowly added
to Sphere B. Assume the two systems are isolated from each other.
How does the eleastic potential energy change for each of the springs?
A. The elastic potential energy of both springs will increase equally.
B. The elastic potential energy of both springs will decrease equally.
C. The elastic potential energy of the spring in setup A will decrease and the elastic potential
energy of the spring in setup B will increase.
D. The elastic potential energy of the spring in setup A will increase and the elastic potential energy
of the spring in setup B will decrease.
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