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7Db Adaptation

The document discusses the concept of environment and physical environmental factors that affect living organisms, such as light, temperature, and water. It explains how different species, like polar bears and cacti, are adapted to their specific habitats, as well as the concept of ecosystems and inherited variation among organisms. Additionally, it highlights how features are inherited from parents and the differences that arise even among siblings due to genetic variation.

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74 views2 pages

7Db Adaptation

The document discusses the concept of environment and physical environmental factors that affect living organisms, such as light, temperature, and water. It explains how different species, like polar bears and cacti, are adapted to their specific habitats, as well as the concept of ecosystems and inherited variation among organisms. Additionally, it highlights how features are inherited from parents and the differences that arise even among siblings due to genetic variation.

Uploaded by

sen.shaalia
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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Download as DOCX, PDF, TXT or read online on Scribd
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7Db Adaptation

Why is there variation between and within species?

Q1. What is environment?

The environment refers to the surroundings in which living organisms exist.


Q2. What are physical environmental factors?
Physical factors are non-living components of the environment that affect living
organisms. These
factors can be; light, temperature, water, soil, wind and precipitation ……;
AQ1. Which of the following are physical environmental factors?
1) Ant – not PEF. (living thing). 5) Light – PEF.
2) Bird – not PEF. 6) Temperature – PEF.
3) Frog – not PEF. 7) Tree – not PEF.
4) Fungus – not PEF. 8) Wind – PEF.
AQ2. Describe the environment in each habitat in pho A, B and C.
A – the desert shown is dry, hot. C – the grass savanna shown is sunny, hot.

B – the Arctic habitat shown is cold, snowy.

AQ3. Describe your environment at the moment. Quiet, learning and cool.
AQ4. How are polar bears adapted to the cold?
Thick fur to keep warm, small ears to stop losing too much heat.
AQ5. A cactus has spines on its stem. Why do you think these are useful?

So that they don’t lose too much water.

AQ6. Suggest the names of habitats in which polar bears, cacti and jack rabbits live in.

a) Polar bears live b) cacti live in c) jack rabbits live


in the Arctic. deserts. in deserts.

AQ7. How do you think the length of hair on meerkats and wolverines helps them survive in their habitat?

Meerkats have short hair so that they can lose heat.

Wolverines have thick hair so that they do not lose too much heat.

 All the animals and plants that live in habitat make up a community.
 Members of communities may have similar adaptation to cop with problems of living in that habitat.

Q8. What is ecosystem?

Ecosystem is the community of organisms and all the physical environmental factors in a habitat.
AQ8. Draw a design for a plant that could live in the same habitat as hog sucker fish.

AQ9. Describe the Arctic ecosystem.

Cold and lots of snow with polar bears and wolverines.

Inherited Variation

Q9. Where most of organism’s features come from? From its parents. These features are
inherited.
Q10. What is inherited variation?
The variation between these organism’s features.
Q11. How do identical twins are formed? From same fertilized egg cell.
AQ10. Name 3 features you have inherited.
a) Nose shape. c) Height. e) Chin dimple.
b) hair colour. d) Eye colour. f) Blood group.

AQ12. Janette’s mother has blue eyes and blond hair.


Janette’s father has brown eyes and brown hair.

Janette has blue eyes and brown hair.

Janette’s brother has brown eyes and brown hair.

From which parent has Janette inherited her blue eyes? Her mother.

b) why do Janette and Jamie have slightly different features?

Because they have been produced from different gametes (each gamete contains a slightly different set of

instructions/genes for features).

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