A2.1 Origin Of Cells

Question 1

How old is planet earth and how did it form?

Answer 1

4.5 Billion years old. A bunch of swirling particles collided and formed larger masses.

Question 2

What did the Early gas compounds consist of?

Answer 2

Methane, ammonia, carbonn dioxide, hydrogen sulphide, they allowed for ultraviolet light to penetrate and retain heat

Question 2

What was the atmosphere like on early earth?

Answer 2

After the number of impacts on earth decreased the atmosphere was thick and volcanic eruptions released water vapour and other compounds.

Question 3

Was free oxygen present on early earth?

Answer 3

No, had it been it would have formed a layer of ozone blocking the ultraviolet light and prevent the development of higher temperatures.

Question 3

What is CH4?

Answer 3

Methane

Question 3

What is NH3?

Answer 3

Ammonia

Question 4

What is H2O?

Answer 4

Water vapour

Question 5

What is carbon dioxide?

Answer 5

CO2

Question 6

Hydrogen Sulphide is?

Answer 6

H2S

Question 7

What is H2

Answer 7

Hydrogen

Question 8

What are the 7 main functions of life?

Answer 8

Metabolism, Growth, reproduction, Response, Homeostasis, Nutrition, Exertion

Question 9

What is N2

Answer 9

Nitrogen

Question 10

Explain Metabolism.

Answer 10

The chemical reactions that occur within an organism to convert one form of energy to another.

Question 11

What is response and why is it important?

Answer 11

Response to stimuli in the environment Is essential for the organism to adapt to its environment

Question 11

What is reproduction?

Answer 11

Hereditary molcules that can passed off to offspring.

Question 12

What is Homeostasis? Provide examples.

Answer 12

The maintenance of a constant internal environment. an organism can control fluctuating temperatures and the acidity levels to create a constant internal environment

Question 13

What is nutrition?

Answer 13

Using a source of componds with many chemical bonds that can be broken down to provide an organism with the energy needed to maintain life.

Question 14

What is excretion?

Answer 14

Enables chemical compounds the organism cannot use or that is toxic to be released from the organisms system.

Question 14

Who first discovered cells?

Answer 14

Robert Hooke in 1665 after looking a cork through a microscope

Question 15

What does cell theory consist of?

Answer 15

• All organisms are consisted of one or more cells
• Cells are the smallest unit life
• All cells come from pre-existing cells