Unit 6 Life Cycles & Environments Study Guide Test

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Questions and Answers

What is the stage called when the insect is camouflaged inside a sac and changes from a worm shape to a full-grown insect?

  • Adult
  • Larva
  • Egg
  • Pupa (correct)

Which adaptation helps some animals survive in cold weather conditions?

  • Presence of spines
  • Waxy coating
  • Layer of blubber (correct)
  • Sharp claws

What type of environment has large open areas of grasses, trees are not common, and it does not rain often?

  • Desert
  • Grassland (correct)
  • Tundra
  • Rainforest

Which special body part helps a polar bear blend in with the snow?

<p>White fur (C)</p> Signup and view all the answers

What structures help some plants survive in hot, dry conditions?

<p>Waxy coating (C)</p> Signup and view all the answers

In which environment would you expect to find animals like caribou and wolves due to its cold and windy climate?

<p>Tundra (D)</p> Signup and view all the answers

What type of environment is known for its dense canopies of vegetation that form three different layers?

<p>Tropical Rainforest (A)</p> Signup and view all the answers

In which type of environment do many animals become active at night due to the extreme heat during the day?

<p>Desert (A)</p> Signup and view all the answers

Which region is typically treeless and covered with snow for much of the year?

<p>Tundra (D)</p> Signup and view all the answers

Where would you find a hot, moist environment with almost year-long rainfall and dense vegetation layers?

<p>Tropical Rainforest (B)</p> Signup and view all the answers

In which type of environment can plants on the forest floor struggle to receive sunlight due to the thick canopy layer?

<p>Tropical Rainforest (B)</p> Signup and view all the answers

Which environment is characterized by areas filled with salty water and divided into five different sections?

<p>Ocean (A)</p> Signup and view all the answers

What is the particular way a living thing grows, reproduces, and dies called?

<p>Life cycle (D)</p> Signup and view all the answers

Which of the following is NOT a life stage of butterflies and lady beetles?

<p>Pupa (A)</p> Signup and view all the answers

What is the term for a single step in a process?

<p>Stage (B)</p> Signup and view all the answers

How do many seeds of plants get dispersed?

<p>By wind, water, or animals (B)</p> Signup and view all the answers

What is the process of producing new offspring in plants and animals called?

<p>Reproduction (B)</p> Signup and view all the answers

Which of the following is typically NOT part of the life cycle of animals with simple life cycles?

<p>Transition from larva to pupa (D)</p> Signup and view all the answers

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Study Notes

Life Cycles

  • Organisms go through observable changes during their life cycles, including birth, growth, development, reproduction, and death.
  • A life cycle is the particular way a living thing grows, reproduces, and dies.
  • A stage is a single step in a process.

Stages of Insect Life Cycle

  • Egg (unborn stage)
  • Larva (the young stage when most feeding is done and the insects look like worms)
  • Pupa (the no-feeding stage when the insect is camouflaged inside a sac and changes from a worm shape to a full-grown insect)
  • Adult (the stage when the insect leaves the pupa, usually has wings, and is ready for reproduction)

Adaptations and Environments

  • Structures of plants and animals are adapted to particular environments.
  • Examples of adaptations:
    • Blubber of seals to survive in cold weather
    • Fur of rabbits to survive in cold weather
    • Waxy coating of a cactus to survive in hot, dry conditions
    • Presence of spines instead of leaves to survive in hot, dry conditions
  • Polar bear adaptations:
    • White fur to blend in with the snow
    • Layer of blubber to stay warm
    • Sharp claws to catch prey
    • Hibernation since food is scarce in winter

Environments

Grassland

  • A place made up of large open areas of grasses
  • Maintained by grazing animals and frequent fires
  • Trees can be present, but often are not
  • It does not rain often

Tundra

  • A place found in the Arctic and on the tops of mountains
  • Climate is cold and windy, with scant rainfall
  • Land is covered with snow for much of the year
  • Typically treeless regions

Tropical Rainforest

  • A hot, moist environment with high rainfall throughout the year
  • Dense canopies of vegetation with three different layers (canopy, understory, forest floor)
  • Plants on the forest floor adapt to survive with little sunlight

Ocean

  • Areas of salty water that fill enormous areas on the Earth's surface
  • Divided into five different sections (Pacific, Atlantic, Indian, Southern, and Arctic Oceans)

Wetland

  • A place where the land is covered by water—salt, fresh, or somewhere in between—either seasonally or permanently
  • Vegetation (plants) can often be found in a wetland

Desert

  • Areas that receive very little precipitation (rainfall)
  • Often very hot, so many animals are active at night when it is cooler

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