Discussion for Animal Reproduction

Multiple Choice

Which type of reproduction refers to offspring produced by genetically identical parent and involves only one parent?

• Asexual

• Sexual

• Reproduction

• Individual

Asexual Reproduction

​Involves one parent

It creates a large thriving population but faces massive die-off if conditions change.

The offspring that is produced has limited ability to adapt.

Multiple Choice

Reproduction is the creation of new individuals from existing individuals. Which of the following ways that organisms reproduce a genetic mixture of both parents?

• Asexual

• Sexual

• Replicate

• Individual

Sexual Reproduction

​Involves two parents

The offspring is a genetic mix of both parents which results in a lot of variations within a specie.

Draw

Instruction: Draw an ''X'' symbol if the organism is giving birth and ''Y'' symbol for organism that lay eggs.

Fertilization

​The joining together of two different sex cells.

1. When the egg becomes fertilized, a new individual called ''ZYGOTE'' develops.

2. Fertilization may be external or internal.

https://youtu.be/5EvnCzOpy2o
Fertilization Process | Reproduction in Animals

Multiple Choice

What type of fertilization occurs outside the body of a female.

• External Fertilization

• Internal Fertilization

Draw

What organisms use internal fertilization?

Multiple Choice

What type of fertilization occurs outside the body of a female.

• External Fertilization

• Internal Fertilization

​External Fertilization

1. Occurs outside the body of a female

2. Usually happens in wet environment

3. Egg are exposed to the environment

4. Has lower survival rate

5. Examples: bony fishes, and amphibians.

Internal Fertilization

Comparison of Internal and External Fertilization.

1. Occurs inside the body of a female

2. Needs to have protection for developing egg cells

3. Fertilized egg or embryo is protected from predators and harsh environment

4. Has higher survival rate

5. Examples: reptiles, birds, and mammals

Method of Internal Fertilization

​Oviparous Viviparous Ovoviviparous

• Egg laying mammals

Examples:
Birds Insects
Lizards Reptiles
Chicken Most fish

• Born alive

Examples:
Humans
Cats
Dogs
Horses

• Eggs retained in the female but the embryo obtains its nourishment from the egg's yolk. Eggs hatch within the body.

Examples:
Rattlesnakes
Some reptiles
Fish

Draw

Which of the following are an example of Ovoviviparous?

Multiple Choice

Which method of internal fertilization is an example of Oviparous?

• Female Mosquitoes

• Platypus

• Cats

• Dogs

Draw

Encircle all organisms that are an example of Viviparous.

Open Ended

1. Why do you think the mode of reproduction of animals are different from human beings, and all other creations of God? (2-3 sentences)

Open Ended

2. 2. Do you believe that the mode of reproduction of animals affect its population due to environmental conditions and chance of survival? In what way? (2-3 sentences)

Wrap Up