Unit 6 Reproduction/Life Cycles Of Algae And Fungi

Question 1

Reproduction in fungi and algae occur in 3 ways namely

Answer 1

Vegetative
Sexual
Asexual

Question 2

The method of reproduction in fungi and algae is controlled by

Answer 2

Environmental factors

Question 3

Sexual reproduction in algae is by

Answer 3

Fusion of different gametes

Question 4

Asexual reproduction in algae is by

Answer 4

Spore formation

Question 5

Alternation of generation occurs in all algae

Answer 5

False
It does not occur in lower algae

Question 6

Two kinds of spores formed in algae are

Answer 6

Zoospores eg chlamydomonas
Aplanospores eg scenedesmus sp

Question 7

Zoospores are naked protoplasmic bodies called ______ usually formed from a single mother cell

Answer 7

Protoplasts

Question 8

In algae, sexual organs are called

Answer 8

Gametangia

Question 9

What is isogamy

Answer 9

Fusion of gametes that are similar in shape, size and behaviour

Question 10

Fusion of gametes that differ in size and behaviour is called

Answer 10

Anisogamy

Question 11

The zygote produced by isogamy or anisogamy is known as

Answer 11

Zygosphore

Question 12

Isogamy and anisogamy occur mostly in lower algae

Answer 12

True

Question 13

The fusion of ____1___ and ___2___ in advanced algae to form ____3____ is described as heterogamy

Answer 13

1 microgamete
2 megagamete
3 oospore

Question 14

When conjugation occurs btw cells of 2 or 3 filaments is known as

Answer 14

Scalariform conjugation

Question 15

Lateral conjugation is conjugation between

Answer 15

Cells of thesame filament

Question 16

Protrusions known as conjugation tubes are formed due to _______

Answer 16

Repulsion

Question 17

Gametes are formed in conjugation in spirogyra by

Answer 17

Contraction of the protoplasm as it looses water and becomes rounded

Question 18

One of the gametes creeps through the conjugation tube by ____ movement

Answer 18

Amoeboid movement

Question 19

Vegetative reproduction in fungi could be by

Answer 19

Fragmentation, budding or by formation of scelerotia

Question 20

Aplanospores in fungi include

Answer 20

Conidiospores
Ascospores
Basidiospores

Question 21

In fungi planospores are subdivided into

Answer 21

Primary zoospores- oval shape
Secondary zoospores- kidney shape

Question 22

Iodiospores and sporangiospores are examples of

Answer 22

Secondary zoospores in fungu

Question 23

In lower fungi reproduction may be by use of

Answer 23

Gametangia

Question 24

In lower fungi, sexual reproduction could be by which processes

Answer 24

Isogamy
Anisogamy
Heterogamy

Question 25

What is karyogamy

Answer 25

Fusion of nuclei of dikaryon to form a diploid nucleus

Question 26

The sequence of processes in reproduction in higher fungi is

Answer 26

Plasmogamy Karyogamy Meiosis

Question 27

_______ is made of a mass of multinucleated protoplasm

Answer 27

Sporangium

Question 28

A dome shaped structure which seperates the Sporangium from the rests of the sporangiophore is called

Answer 28

Columella

Question 28

A dome shaped structure which seperates the Sporangium from

Question 29

At maturity, contents of the Sporangium are divided into

Answer 29

Uninucleate masses

Question 30

Each of the masses develops a clear resistant wall to become spores called

Answer 30

Gonidia

Question 31

In mucor, Two morphologically identical but physiologically different forms are called

Answer 31

Heterothallic hyphae Same form different functions

Question 32

In mucor, sexual reproduction commences with development of

Answer 32

Progametangia Two short branches formed from 2 laterally placed branches

Question 33

In mucor, zygospore nuclei divide by meiosis to form a _________ which eventually forms a Sporangium at its tip

Answer 33

Promycellial hypha