Questions
A plant parasite that cannot complete its life cycle without a host is called
- facultative parasite
- obligate parasite
- commensal
- haustoria
Dodder is an example of
- root holoparasite
- stem hemiparasite
- root hemiparasite
- stem holoparasite
An example of root holoparasite is
- mistletoe
- dodder
- hydnora
- rafflesia
Amphivasal vascular bundle is that in which
- phloem is surrounded by xylem
- xylem is surrounded by phloem
- phloem is on both the sides of xylem
- phloem and xylem lie in different radii
The ability of a single cell to divide and produce all differentiated cells of a plant is called
- oligopotency
- unipotency
- multipotency
- totipotency
Stele in the stem typically consists of
- vascular tissue and cortex
- vascular tissue and ground tisue
- vascular tissue, ground tissue and pericycle
- ground tissue, pericycle and cortex
The study of pollen is called
- paleontology
- palynology
- paleoecology
- carpology
Lenticels originate in the
- cortex of the stem
- periderm of the stem
- pericycle of the stem
- vascular cambium
The plant hormone which inhibits seed germination is
- auxin
- cytokinin
- abscisic acid
- gibberellin
In monocots the structure which supplies food materials to growing embryo is
- cotyledons
- endosperm
- scutellum
- coleorhiza
The edible part of lychee fruit is
- pericarp
- endocarp
- aril
- seed coat
Lateral roots in plants are produced by
- root cap
- endodermis
- pericycle
- root hairs
Peroxisomes were discovered by
- Christian De Duve
- Robert Hooke
- Carl Benda
- George Palade
The instrument used to measure the rate of water uptake by a leafy shoot is called
- potometer
- crescograph
- pyrometer
- manometer
The primary cell wall in plants is made of
- cellulose and pectin
- cellulose and glycan
- cellulose microfibrils and lignin
- cellulose, pectin and glycan
The 80s ribosomes are composed of
- 30s and 50s sub-units
- 40s and 60s sub-units
- 60s and 20s sub-units
- 30s and 60s sub-units
Triticale is a hybrid of
- rice and wheat
- wheat and ragi
- barley and ragi
- wheat and rye
Chiropterophily refers to
- pollination of flowers by bats
- pollination of flowers by birds
- pollination of flowers by insects
- pollination of flowers by wind
Polyploidy in plants are introduced using
- tryptophan
- colchicine
- chymosin
- gibberellins
Which of the following is the hexaploid form of wheat?
- Triticum durum
- Triticum monococcum
- Triticum aestivum
- Triticum turgidum
The botanical name of red bread mould used in genetical studies is
- stachybotris chartarum
- pisum sativum
- penicillium roqueforti
- neurospora crassa
Exine and intine are the
- outer and inner layers of seed coat
- outer and inner layers of leaf epidermis
- outer and inner layers of pollen grain wall
- outer and inner layers of a fruit
The sheath which encloses the apical meristem in a monocot embryo is
- coleoptile
- scutellum
- coleorhiza
- endosperm
Helical arrangement of chloroplasts is seen in
- chara
- ulothrix
- kelps
- spirogyra
A pollen grain is composed of
- a vegetative cell only
- a generative cell only
- both vegetative and generative cells
- layers of sterile cells only