quiz no. 3 renu educational group

RENU EDUCATIONAL GROUP

RENU EDUCATIONAL GROUP BY VIJAY K VERMA

Present

INTERACTIVE

MULTIPLE CHOICE

QUESTIONS

These multiple choice questions 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.

Test3 FLOWERING PLANTS

I am BETTY.Your quiz instructor.

I ask you some question OK.

R U Ready

QUESTION 1

Question 1

In a flowering plant, the spongy mesophyll is to be found in …

(a) the roots

(b) the stem

(c) the leaf

(d) the fruit

Question 2

palisade

mesophyll

spongy

mesophyll

Vertical section through leaf

Question 2

In a flowering plant, sugars are transported …

(a) upwards in the xylem

(a) upwards in the phloem

(c) upwards or downwards in the phloem

(d) upwards or downwards in the xylem

Question 3

Water and mineral ions are transported in the xylem but not

sugars

Yes and No

Sugars are transported in the phloem but not exclusively in an

upward direction

Sugars are transported in the phloem. The

direction may be upwards, e.g. from the leaves to

the growing point or the fruits, or downwards, e.g.

from the leaves to the roots or storage organs.

Water and mineral ions are transported in the xylem but not

sugars

Question 3

The root of a flowering plant absorbs water and mineral ions mainly

through …

(d) the xylem

(c) the phloem

(b) the root hairs

(a) the epidermis

Question 4

The epidermis is largely impermeable except in the region

where root hairs develop

Transverse section

through a root

root hair

epidermis

phloem

Root hair cell

The root hairs are

extensions from some of

the epidermal cells.

They have very thin cell

walls and absorb water

and mineral ions.

The phloem conducts sugars and amino acids to the root but is

not involved in the uptake of water

The xylem carries water from the root to the rest of the plant

but it is not the structure involved in the entry of water

Question 4

The force responsible for water travelling up a tree is generated

mainly by …

(d) osmosis

(c) active transport

(b) root pressure

(a) evaporation from the leaves

Question 5

Evaporation of water from the

leaves creates a tension which

draws water up the trunk

evaporation

Root pressure can force water some distance up the trunk but

is insufficient to take it all the way

Active transport enables the roots to take up dissolved

substances against a diffusion gradient. It is not responsible

for the flow of water up the trunk

Osmosis generates root pressure but this is insufficient to

force water all the way up the trunk

Question 5

Which of the following are the reproductive organs of a flowering

plant?

(d) Stamens and ovary

(a) Petals and sepals

(b) Style and stigma

(c) Pollen nucleus and egg cell

Question 6

The sepals protect the flower when it is in bud. The colour and

scent of the petals (in insect-pollinated plants) attract insects

which pollinate the flower

The style and stigma are attached to the ovary and play a part

in the transfer of the pollen nucleus to the egg cell in the

The pollen nucleus and the egg cell are the gametes. The

pollen nucleus is the male gamete and the egg cell is the

female gamete

stamen

style and

stigma

Stamens are the male

organs and the ovary

is the female organFlower structure of Stitchwort

Question 6

The seeds in this fruit will be dispersed by …

(d) animals

(c) wind

(b) water

(a) an explosive method

Question 7

The pod (fruit) wall dries out,

splits and curls back suddenly,

flicking out the seeds.

Examples are gorse and lupin

If the seeds landed in a stream they might be dispersed by the

current, provided they did not sink, but they are not adapted

for water dispersal

The seeds are smooth with no feathery or fluffy structures

which would be expected for wind dispersal. Also they are too

Seeds dispersed by mammals have tiny hooks which catch in

the animal’s fur. Sometimes the hooks are on the fruit, and

the seeds fall out as the animal moves about.

Seeds dispersed by birds are usually contained in an edible

fruit.

Question 7

Which of the following statements is the most accurate?

In order to germinate most seeds need…

(c) water, oxygen and a suitable temperature

(b) water, oxygen, nitrates, and a suitable

temperature

(a) water, carbon dioxide, sunlight and a suitable

temperature

(d) water, oxygen and light

Question 8

Carbon dioxide and sunlight are not needed for germination

but they will be needed when photosynthesis begins in the

seedling.

Nitrates are not needed for germination, but they will be when

the seedling grows and starts to make amino acids and

proteins

Most seeds need only these three

conditions although some seeds need to

undergo a period of low temperature

before they will germinate.

It depends

Most seeds do not need light to germinate but a

few do. e.g. some species of lettuce.These seeds

need a light stimulus only in order to get started.

Once germination has begun, light is not needed

Question 8

The drawing shows a bean

seed germinating. Which of

the structures is the hypocotyl

Question 9

This is the cotyledon being withdrawn from the testa

The hypocotyl is the part of the stem below the

cotyledons

This is the root which has developed from the radicle

This is a lateral root

Question 9

A group of plants derived by vegetative reproduction from a

single parent is called…

(b) a colony

(c) a clone

(d) a community

(a) a population

A population is made up of all the members of the same

species in a habitat. It does not matter whether they are

derived sexually or asexually.

The plants may well form a colony but this could be

produced from seed as well as vegetatively

Any population of organisms derived asexually

from a single parent is called a clone. The

organisms will be genetically identical.

A community consists of all the living organisms occupying

the same habitat

End of questions

End show

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