C:-Umbillicaria
D:-Cladonia
Correct Answer:- Option-C
Question49:-Early blight of Potato is caused by
A:-Altemmaria solani
B:-Phytopthora infestans
C:-Xanthomonas oryzae
D:-Fusarium solani
Correct Answer:- Option-A
Question50:-Which mechanism is characterised by the rapid death of cells in the local region surrounding an infection?
A:-Parallelism
B:-Hypersensitivity
C:-Hypertrophy
D:-Hyperplasia
Correct Answer:- Option-B
Question51:-Phytoalexins are secreted by plants in response to fungal reaction. These compounds are generally
A:-Phenolic compounds
B:-Glycoproteins
C:-Lipids
D:-Proteins
Correct Answer:- Option-A
Question52:-Exclusion of plant disease by legislation is known as
A:-Disease resistance
B:-Plant quarantine
C:-Biological control of plant
D:-Cultural control
Correct Answer:- Option-B
Question53:-The author of the book entitled "The first land plant” is
A:-S.R. Kashyap
B:-P.N. Mehra
C:-F.0. Bower
D:-R.N. Chopra
Correct Answer:- Option-C
Question54:-Which among the following is a fossil bryophyte?
A:-Tortula
B:-Haplomitrium
C:-Sphaerocarpos
D:-Hepaticites
Correct Answer:- Option-D
Question55:-Antiseptic properties are shown by the moss
‏+-:ھ‎
‎B:-Pogonatum
‎C:-Polytrichum
‎D:-Sphagnum
‎Correct Answer:- Option-D
Question56:-The fern Acrostichum is a
A:-Halophyte
B:-Helophyte
C:-Epiphyte
D:-Psychrophyte
Correct Answer:- Option-A
Question57:-A corm like rhizomorph occurs in
A:-Lycopodium

C:-Isoetes

D:-Rhynia

Correct Answer:- Option-C
Question58:-The stele comprises

A:-Xylem, phloem and pith