interactive questions 09

7/31/2019 Interactive Questions 09

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Living organisms

INTERACTIVE

MULTIPLE CHOICEQUESTIONS

The answers are provided.

Explanations of why the alternativesare unsatisfactory are also offered


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These multiple choice questions are similar to the ones set

by the GCSE and IGCSE Examination Boards except that,in some cases, there may be more than one acceptable

answer.

For this reason, even if you select a correct answer at your

first attempt, it is worth looking at all the alternatives

(a) to see if there is a better answer and

(b) to see why some of the alternatives are unacceptable.

First slide


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Question 1

One of the characteristics of living organisms isthat they all respire.

Respiration is

(c) obtaining energy by chemically

breaking down food

(a) obtaining oxygen by breathing(b) obtaining energy from sunlight

(d) breaking down large molecules to

smaller molecules by digestion

Question 2


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No

Breathing is the method by which most animals obtain

oxygen from their surroundings (air or water). It is not a

characteristic of all living organisms.


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No

Only plants can obtain energy from sunlight


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Yes

Nearly all living organisms obtain their energy by breaking

down food substances either aerobically (with the use of

oxygen) or anaerobically (without oxygen)

C6H12O6 + 6O2 6CO2 + 6H2O + energy

C6H12O6 2C2H5OH + 2CO2 + energy

Aerobic respiration

Anaerobic respiration (alcoholic fermentation)


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Breaking down large molecules by digestion uses

energy rather than releasing it and is a property of

animals, fungi and bacteria

No


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Question 2

These animals are all

classsed as

(a) insects(b) spiders

(c) invertebrates

(d) arachnids

1cm

1cm

.05mm

a

b c

Question 3


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Insects have three pairs of legs. These organisms all

have four pairs

No


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No

c is a spider but a is a scorpion and b is a mite


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They are invertebrates, but so are worms, molluscs,

crustacea etc. Invertebrate is a descriptive term not a

classification

No


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Yes

a is a scorpion, b is a mite and c is a spider


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Question 3

The classificatory term Mustela erminea, refers to

(a) a Species

(b) a Class

(c) an Order

(d) a Genus

Question 4


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The double-barrelled name Mustela erminiaindicates

that this is a species of animal, namely, the stoat

Yes


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This animal is a stoat and its Class is Mammalia (the

mammals)

No


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The animal is a stoat which belongs to the Order

Carnivora (the carnivores).

No


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The Genus is Mustela

Mustela erminea is the stoat

Mustela nivalis is the weasel and

Mustela putoria is the polecat

No


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Question 4

Which of the following is a defining characteristic of

mammals?

(a) They maintain a constant body temperature,

above that of their surroundings (warm blooded)

(b) Their young are born alive

(c) They suckle their young

(d) They have four limbs

Question 5


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No

Mammals do maintain a constant body temperature above

that of their surroundings but so do birds


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Live birth is a mammalian characteristic but it is not

exclusive to mammals. Some reptiles (e.g. chameleons),

some fish (e.g.guppies) and even some insects (e.g. aphids)

give birth to living young

No


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Suckling their young on milk is an exclusive mammalian

characteristic

Yes


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No

Amphibia, reptiles and birds also have four limbs


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Question 5

A fish obtains its oxygen from .

(a) the O ofH2O

(b) the oxygen dissolved in water

(c) the air

(d) its food

Question 6


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No

Fish are unable to decompose water to release oxygen


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Yes

It is atmospheric oxygen dissolved in water that the fish uses


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No

There are certain fish, (called. lung fish) which live in

poorly oxygenated waters, that can get some of their oxygen

from atmospheric air but they are a small minority


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No

Fish do not get oxygen from their food


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Question 6

Which of the following features adapt a bird for flight?

(a) Hollow bones

(b) Wings

(c) Powerful pectoral muscles

(d) Feathers

Question 7


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Yes

Hollow bones reduce the birds weight


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No

Birds wings are essentialforflight not an adaptation to

flight. Without wings there is no flight*

* Nevertheless, if asked to list a birds adaptations to flight, it

might be expedient to include wings


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Yes

The development of large, powerful pectoral muscles is

an adaptation to flight. These are the muscles which

move the wings during flapping flight


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No

Only a small proportion of feathers contribute to flight.

Even flightless birds have feathers.


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Question 7

An example of sensitivity in plants is

(a) germination of seeds

(b) seed dispersal

(c) wilting

(d) phototropism

Question 8


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No

Admittedly, most seeds need water before they will

germinate but this is essential for germination to take place

rather than a response to a stimulus


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No

Many forms of seed dispersal need specific conditions

but these are not the same as a stimulus


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No

Wilting takes place when a plant loses more water than it is

absorbing. It is not a response to a stimulus


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Yes

Phototropism is a response to a stimulus. The stimulus is

light coming from one side of the plant and the response is

a growth movement towards the light source


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Question 8

These microscopic organisms(not drawn to the same scale)

are all members of the

Kingdom

(a) Monera

Chlamydomonas

Euglena

Amoeba

Vorticella

Paramecium

(b) Protozoa

(c) Protophyta

(d) Protoctista

Question 9


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No

The Kingdom Monera includes bacteria and

blue-green algae


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No

The term Protozoa refers to the one-celled organisms

that feed like animals i.e, take in sold food and digest it.

Amoeba, Paramecium and Vorticella are Protozoa, but

Protozoa do not constitute a Kingdom


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No

The term Protophyta describes those single-celled

organisms that feed like plants, i.e. they contain

chloroplasts and make their food by photosynthesis.

Chlamydomonas and Euglena are examples ofProtophyta but the Protophyta do not constitute a

Kingdom


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Yes

'The Kingdom Protoctista includes all the single-celled

organisms that are not bacteria or blue-green algae


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Question 9

Fungi get their food by

(a) absorbing nutrients from the soil

(b) secreting enzymes and reabsorbingthe digested products

(c) ingesting other organisms and digesting

them

(d) making their food during photosynthesis

Question 10


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No

Not all fungi live in the soil. Though the soil may

contain mineral ions it does not contain any nutrients.


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Yes

Fungi secrete enzymes into their surroundings (e.g. soil

or decaying organic matter). The enzymes digest the

organic matter and the soluble products are absorbed into

the fungal hyphae


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No

Fungi do not ingest other organisms


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No

Fungi do not contain chlorophyll and are therefore unable

to make their food by photosynthesis


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Question 10

Growth takes place as a result of

(a) cell division

(b) intake of food

(c) increase in mass

(d) increase in size


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No

Cell division usually contributes to growth but growth doesnot result solely from cell division.

For example, the frogs egg cell undergoes rapid and repeated

cell division but does not increase in size or mass

Single cell 32 cells

It must also be remembered that single-celled

organisms grow without cell division


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No

Organisms must have food in order to grow but there may be

periods in their lives where all the food is needed to provide

energy and no growth can take place. Intake of food does not,

therefore, necessarily result in growth


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Yes

An increase in mass results in growth. It is usually

accompanied by an increase in size


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No

Increase in size usually accompanies growth but unlessthere is a corresponding increase in mass it cannot be

called growth. For example a butterfly emerging from a

pupa increases its size but there is no increase in mass

Pupa Butterfly


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