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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.