Life Cycle Basics
What is death/die?
This is the very last stage of an organism's life cycle
What is tadpole?
This is the stage after a frog lays eggs
What is birth?
Every single life cycle must have a beginning, which is called this
What is Tad?
This is the name of the main character in the story Tad that is read aloud for this task.
When does a frog's life begin?
A frog's life begins when its eggs are laid.
What is reproduction?
This process by which an organism creates offspring is the only way for the life cycle to begin again
What are gills?
In the tadpole stage, a frog uses these structures to breathe underwater, which are later covered by skin
What is grow and change?
In addition to beginning with birth and ending in death, all organisms must also do this during their life cycle.
What is leave the water / live above the water?
When Tad's siblings became frogs, they could do this, which made Tad feel more alone.
Depending on the species, how many eggs are laid by female frogs when they mate with adult male frogs?
2,000 to 20,000
What is reproduce?
Life cycles are called a "cycle" because many organisms do this, which causes the cycle to start over for their offspring
What is on land?
The physical changes a frog must go through—like growing lungs and eardrums—prepare the tadpole for life here
What is a bean plant (or a bean)?
This organism, which begins as a seed that is wrapped in a hard shell, is one of the plants researched in this task.
What are legs (or arms) and her tail?
Before becoming an adult frog, Tad had to go through a major change where she grew this and lost this.
What are gametes?
sperms and eggs
What is universality?
The need for all living things to grow, reproduce, and eventually die.
What is in order?
A model of the frog life cycle must show that the development of a frog occurs in this way.
What is they are born, grow and change, and eventually die?
The research on organisms like mayflies, eels, beans, and trees supports the argument that all organisms share this same progression in their life cycles
What is it stops/ends?
If a real-life tadpole is eaten by a predator like "Big Blub," its life cycle does this instead of continuing to the next stage.
In the "Tad" read aloud story, what do you think would happen if Big Blub found the tadpoles? Is hiding the right idea?
Tad became increasingly more alone based on changes that Tad experienced. This happened because her siblings became frogs before she did. Before Tad discovers this, she uses her new legs to leap away from Big Blub. This is a new way of moving that enabled her to escape an underwater predator. She lands on a lily pad above the water.
What is independence or mobility?
The life cycle model provides evidence that an organism's basic needs change over time. For example, a baby penguin's need for care is high, while an adult penguin's need for this to find food is greater.
What is a froglet (or young frog)?
Before it can become an adult frog and reproduce, a frog must first go through this stage, where it has legs and a tail.
What is difference/diversity?
An organism's life span, which is the total time it takes to go from birth to death, is an example of an area of this between different life cycles.
What is land (or a mix of water and land)?
At the beginning of the story, Tad lives in the water and breathes with gills. When she changes, her need for a large body of water decreases as her need for this type of habitat increases.
Why do life cycles occur in cycles?
Life cycles are "cycles" because during their lives, many organisms reproduce. When this happens, the cycle starts over for their offspring, who later grow and reproduce too.