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3rd Grade Growth and Development of Organisms
2015­11­09
www.njctl.org
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Classwork #1: Life Cycles
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1 Describe how the Venus flytrap meets all of the characteristics of a living thing.
• Eat/use energy
• Grow/develop
• Reproduce
• Interact with Environment
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Homework #1: Life Cycles
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1 Describe the stages of the life cycle of a red wolf.
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2 The captive breeding program focused on what stage of the life cycle?
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3 Why is this an important stage for all living things?
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4 When the red wolves were first captured in the wild, there were only 17 of them. Now, there are as many as 75 in the wild. By how much did the wild population increase? 9
Classwork #2: Plant Life Cycles I
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1 Both of the pictures show different parts of an apple tree. What are two structures shown that are evidence that these are adult apple trees?
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2 How would a young apple tree differ from an adult apple tree?
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3 If you plant an apple tree, it will eventually germinate. What do you call the new plant that emerges from the seed?
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Homework #2: Plant Life Cycles I
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1 Why does the chestnut tree need to germinate quickly?
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2 The avocado seed takes a long time to germinate. What does this tell you about the amount of food stored inside the seed for the embryo?
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3 What is one similarity between the chestnut and the avocado?
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4 What is one difference between the chestnut and the avocado?
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5 Both seeds have a seed coat. What is the purpose of the seed coat?
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Classwork #3: Plant Life Cycles II
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Put the steps of plant reproduction in order by placing a number on the line in front of each step. Number 1 is done for you. A seed is created.
Bright petals attract pollinators.
The seed germinates and grows into an adult plant.
Pollen from the stamens rubs off on the pollinator.
The pollinator moves to another flower where pollen is dropped onto the pistil.
The seed falls to the ground and becomes buried.
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Draw pictures of each step of plant reproduction.
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Homework #3: Plant Life Cycles II
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1 Label the parts of the flower below.
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2 In what structure is pollen formed?
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3 What structure creates the seed?
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4 What needs to happen in order for a seed to be created?
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5 Why are petals often brightly colored?
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6 What role do pollinators play in plant reproduction?
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Classwork #4: Animal Life Cycles
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1 If you look closely at the picture of salmon eggs, you can see the yolks. What is the purpose of the yolk?
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2 Salmon eggs are laid in water. What type of egg shell do you think they have: hard shell, leathery shell or no shell?
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3 A female salmon can lay 5,000 eggs per nest and up to 7 nests. Use your calculator to determine how many eggs she can lay.
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4 What is one similarity between the salmon and the elephant life cycles?
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5 What is one difference between the salmon and the elephant life cycles?
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Homework #4: Animal Life Cycles
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1 What type of growth pattern does a honeybee have: direct development, complete metamorphosis, or incomplete metamorphosis? How do you know?
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2 What is one similarity and one difference between complete and incomplete metamorphosis?
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3 This cycle takes a total of 21 days. Account for this time by listing the number of days for each part of the transformation.
Stage
Egg
Larva
Pupa
# of Days
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