B3 life on earth
Download
1 / 9

B3 Life on Earth - PowerPoint PPT Presentation


  • 71 Views
  • Uploaded on

B3 Life on Earth. Lesson 1: Species and Adaptation. Objectives. MUST explain how species are adapted to their environments and give examples SHOULD explain that species compete for resources COULD predict the effect on species of disturbance to a food web. Key Words.

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about ' B3 Life on Earth' - ashtyn


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
B3 life on earth

B3 Life on Earth

Lesson 1: Species and Adaptation


Objectives
Objectives

  • MUSTexplain how species are adapted to their environments and give examples

  • SHOULD explain that species compete for resources

  • COULD predict the effect on species of disturbance to a food web


Key words
Key Words

  • You need to be able to define the following:

    • Adaptation

    • Species

    • Habitat

    • Competition

    • Food web

    • Interdependence


Textbook answers
Textbook Answers

1) A group of organisms that can breed together to produce fertile offspring.

2) It has gills for gaseous exchange; these can exchange gases across their surface underwater; it has fins to keep it upright when swimming; it has a mouth position that suits its way of feeding; a swim bladder that allows it to maintain a variety of depths in the water.

3) Space (particularly space in the light spots where there is a gap in the canopy above); light; nutrients (the competition for nutrients would be between their root systems).


Textbook answers1
Textbook Answers

4) There might be more heather for the sheep and rabbits to feed on, but the populations of shrews and lizards would decrease. The population of insect-eating birds would decrease because their food source has gone; the population of owls and merlins might also be impacted because one of their groups of prey species (the insect-eating birds) was depleted.

6) The way that all the species in the habitat depend on one another for survival; if the number of one species dropped or increased rapidly, this would have a knock-on effect on all other species in the food web (with examples).


Worksheet answers
Worksheet Answers

Activity 1 (Low demand)

  • Polar bear: In order – cold, thick fur, insulate, blubber, black, snow, claws, nostrils

  • Water lily: In order – supported, surface, waxy cuticle, absorb sunlight, wind, water movement,


ad