( ͡° ͜ʖ ͡°) student 1 : B1 Topic 1 ( ͡° ͜ʖ ͡°)

Question 1

Choose the word which is different from the rest.

A. Chicken B. Fish
C. Swan D. Crocodile
E. Frog

Answer 1

A. Chickens cannot live in water ͡° ͜ʖ ͡ -

Question 2

What are the two types of variation?

Answer 2

Environmental and genetic. ᕦ( ͡°╭͜ʖ╮͡° )ᕤ

Question 3

Which statement about inheritance is correct?

The nucleus of a cell contains chromosomes, which carry genes

The nucleus of a cell contains genes, which carry chromosomes

The cytoplasm of a cell contains chromosomes, which carry genes

Answer 3

The nucleus of a cell contains chromosomes, which carry genes.( ͡^ ͜ʖ ͡^)

Question 4

What type of factor is involved in determining body mass?

Environmental factors only

Inherited factors only

Both environmental factors and inherited factors

Answer 4

Body mass can be determined by both environmental factors and inherited factors. ( ‾ʖ̫‾)

Question 5

What type of factor is involved in determining language?

Environmental factors only

Inherited factors only

Both environmental factors and inherited factors

Answer 5

Environmental factors only 
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Question 6

What type of factor is involved in determining eye colour?

Environmental factors only

Inherited factors only

Both environmental factors and inherited factors

Answer 6

Only inherited factors determine eye colour. ( ͡ ͡° ͡° ʖ ͡° ͡°)

Question 7

Where in one of a body’s cells are chromosomes found?

The nucleus

The cell wall

The cell membrane

Answer 7

Chromosomes are found in the nucleus. ( ͠° ͟ʖ ͡°)

Question 8

What is genetic information carried by?

Lipids

DNA

Complex sugars

Answer 8

Genetic information is carried by DNA. ᕦ( ͡° ͜ʖ ͡°)ᕤ

Question 9

What is one advantage of taking cuttings from plants?

New, genetically identical plants can be grown quickly and cheaply

All the offspring produced will be susceptible to the same diseases

New varieties are produced with each cutting, depending on which plant hormone is used

Answer 9

One advantage of taking cuttings from plants is that new, genetically identical plants can be grown quickly and cheaply.( ͡o ͜ʖ ͡o)

Question 10

What sort of organisms can be genetically engineered?

Plants only

Animals only

Plants and animals

Answer 10

Plants and animals ヽ༼ຈل͜ຈ༽ﾉ

Question 11

Which process removes carbon dioxide from the atmosphere?
Combustion
Respiration
Photosynthesis

Answer 11

Photosynthesis removes carbon dioxide from the atmosphere. Respiration releases it.

Question 12

Which process releases carbon dioxide to the atmosphere?
Feeding
Decomposition
Photosynthesis

Answer 12

Decomposition is caused by decomposers, which respire and so release carbon dioxide. Photosynthesis needs carbon dioxide from the atmosphere.

Question 13

Which substances contain carbon?
Glucose but not cellulose
Proteins and fats
Proteins but not amino acids

Answer 13

Proteins, fats and carbohydrates contain carbon. Proteins are built up from amino acids, and both contain carbon.

Question 14

Which conditions are best for decomposition to happen quickly?
Warm, moist conditions
Cold, moist conditions
Warm, dry conditions

Answer 14

Warm, moist conditions are best for decomposition to happen quickly. Low temperatures reduce the rate of decay, which is why food is stored in refrigerators.

Question 15

What do nitrogen-fixing bacteria do?
They convert nitrate ions into nitrogen gas
They convert ammonium ions into nitrate ions
They convert nitrogen gas into nitrate ions

Answer 15

Nitrogen-fixing bacteria convert nitrogen gas into soluble ions such as nitrate ions. Denitrifying bacteria convert nitrate ions into nitrogen gas.

Question 16

What do nitrifying bacteria do?
They convert nitrate ions into nitrogen gas
They convert ammonium ions into nitrate ions
They convert nitrate ions into ammonium ions

Answer 16

Nitrifying bacteria convert ammonium ions into nitrate ions, rather than the other way around.

Question 17

Which substances contain nitrogen?
Proteins
Carbohydrates and fats
Proteins and carbohydrates

Answer 17

Proteins contain nitrogen but carbohydrates do not. Proteins, carbohydrates and fats also contain carbon and oxygen.

Question 18

About what percentage of the air is nitrogen?
0.04%
21%
78%

Answer 18

About 78% of the air is nitrogen. About 21% is oxygen.

Question 19

Which process releases water vapour to the atmosphere?
Transpiration
Condensation
Precipitation

Answer 19

Transpiration by plants releases water vapour. Condensation removes water vapour from the atmosphere.

Question 20

Which process removes water vapour from the atmosphere?
Evaporation
Condensation
Nitrogen fixation

Answer 20

Condensation into liquid water in clouds removes water vapour from the atmosphere. Nitrogen fixation is part of the nitrogen cycle, removing nitrogen from the atmosphere.