Study your flashcards anywhere!

Download the official Cram app for free >

  • Shuffle
    Toggle On
    Toggle Off
  • Alphabetize
    Toggle On
    Toggle Off
  • Front First
    Toggle On
    Toggle Off
  • Both Sides
    Toggle On
    Toggle Off
  • Read
    Toggle On
    Toggle Off

How to study your flashcards.

Right/Left arrow keys: Navigate between flashcards.right arrow keyleft arrow key

Up/Down arrow keys: Flip the card between the front and back.down keyup key

H key: Show hint (3rd side).h key

A key: Read text to speech.a key


Play button


Play button




Click to flip

22 Cards in this Set

  • Front
  • Back
17. What does the biological clock control?
1. Estivation
2. Hibernation
3. Migration
18. What is an animal's internal control of natural cycles?
The biological clock
19. a. What is the stimulus in phototropism?

b. What's the plant's response to the stimulus?
(Short Answer)
a. The stimulus is light.

b. The plant cells on the dark side of the shoot grow longer than the cells on the other side. As a result, the shoot bends toward the light.
20. What are 3 things that happen to an organism during hibernation?
1. The animal survives on stored body fat
2. The animal has a lower body temperature than it usually does
3. The animal remains inactive
21. What type of tropism do the root tips of most plants show?
positive gravitropism
22. Why do trees lose their leaves before winter or a dry season?
The loss of their leaves helps prevent water loss in the tree.
11. When a snake gets too warm because of sunshine, it needs to move to a cooler place. What type of stimulus is this a response to?
External stimulus
12. What animals hibernate?
Bears, Texas horned lizards, snakes
13. Define gravitropism.
Gravitropism is when the growth of a plant changes direction in response to gravity
14. What are the four stimuli, or tastes, the human taste buds can detect?
1. Salty
2. Sweet
3. Bitter
4. Sour
15. What are three ways animals might deal with harsh conditions?
1. Migration
2. Estivation
3. Hibernation
16. What is the difference between hibernation and estivation? (Short Answer)
1. Hibernation happens in the winter.
2. Estivation happens in the summer.
5. Define phototropism.
The tendency of shoot tips of plants to grow and bend toward the light.
6. What are three stimulus for the sense of touch?
1. Pain
2. Heat
3. Pressure
7. Each winter monarch butterflies travel to central Mexico to wait for spring. What is this behavior an example of?
8. What are hormones?
Chemicals made in the body
9. Define migrate.
Animals traveling from one place to another.
10. What is thigmotropism?
A response in plants to touch.
1. Define stimulus.
A stimulus is anything that causes a response in an organism.
2. What are the similarities and differences between hibernation and migration? (Short Answer)
1. They are similar because they both are responses to the external stimuli of the changing seasons.
2. They are different because in hibernation, the animal is inactive. Migrating animals are active and travel to a warmer location for winter.
3. When you are thirsty and get a drink of water, what type of stimulus are you responding to?
internal stimulus
4. Define impulse.
Impulses are the electrical messages that pass along the nerves.