Biological Classification — Page 5 | NEET Biology

Q41

Which of the following statements is correct about lichens?

A Lichens are good pollution indicators.

B Lichens are often used as bioindicators of air pollution and cannot grow in polluted areas.

C Algal component of lichens is called photobiont.

D Fungal component of lichens is called mycobiont.

Correct Answer

Option B

Solution

(b) Lichens are used as indicators of air pollution.

If air is polluted with sulphur dioxide there may be no lichens present.

Q42

Which of the following secretes toxins during storage conditions of crop plants?

A Aspergillus

B Penicillium

C Fusarium

D Colletotrichum

Correct Answer

Option A

Solution

(a) Aspergillus flavus produces carcinogenic Aflatoxin during storage condition of crop plant.

Q43

Ergot of rye is caused by a species of

A Uncimula

B Ustilago

C Claviceps

D Phytophthora

Correct Answer

Option C

Solution

(c) Ergot of Rye is caused by the fungus Claviceps purpurea.

Q44

Which pair of the following belongs to Basidiomycetes?

A puffballs and Claviceps

B Peziza and Stinkhorns

C Morchella and mushrooms

D birds nest fungi and puffballs

Correct Answer

Option D

Solution

(d) Birds nest fungi and puffballs belong to class Basidiomycetes.

Q45

Which one is the wrong pairing for the disease and its causal organism?

A Black rust of wheat - Puccinia graminis

B Loose smut of wheat - Ustilago muda

C Root-knot of vegetables - Meloidogyne sp

D Late blight of potato - Alternaria solani

Correct Answer

Option D

Solution

(d) Late blight of potato is caused by Phytophthora infestans, not Alternaria solani.

Q46

Which of the following statements is incorrect?

A Morels and truffles are edible delicacies.

B Claviceps is a source of many alkaloids and LSD.

C Conidia are produced exogenously and ascospores endogenously.

D Yeasts have filamentous bodies with long thread-like hyphae.

Correct Answer

Option D

Solution

(d) Yeast is unicellular. It lacks filamentous structure or hyphae.

Q47

White rust disease is caused by

A Claviceps

B Alternaria

C Phytophthora

D Albugo candida

Correct Answer

Option D

Solution

(d) Albugo candida is an obligate parasite causing white rust on members of family Cruciferae.

Q48

One of the major components of cell wall of most fungi is

A Chitin

B Peptidoglycan

C Cellulose

D Hemicellulose

Correct Answer

Option A

Solution

(a) In fungi, the cell wall is composed of chitin, glucans and glycoproteins.

Q49

Which of the following environmental conditions are essential for optimum growth of Mucor on a piece of bread?

A A, D and E only

B B, D and E only

C B, C and F only

D A, C and E only

Correct Answer

Option A

Solution

(a) Mucor requires a temperature of about 25 C, humidity about 95%, and a shady place to grow fully.

Q50

Which one of the following is true for fungi?

A They are phagotrophs

B They lack a rigid cell wall

C They are heterotrophs

D They lack nuclear membrane

Correct Answer

Option C

Solution

(c) Fungi lack chlorophyll and are heterotrophs that acquire their nutrient by absorption.