Which ones produce androgenic haploids in anther cultures
Anther wall
Tapetal layer of anther wall
Connective tissue
Young pollen grains
The rotenone is
an insect hormone
a bioherbicide
a natural herbicide
a natural insecticide
One of the major difficulties in the biological control of insects pests is the
Practical difficulty of introducing the predator to specific areas
Method is less effective as compared with the use of insecticides
Predator does not always survive when transferred to a new environment
The predator develops a preference to other diets and may itself become a pest
Suppression of reproduction of one type of organisms by utilizing some features of biology or physiology to destroy it or use of another organism is known as
competition
predation
biological control
physiological control
Which one of the following is an Indian medicinal plant?
Saccharum officinarum
Rauwolfia serpentina
Oryza sativa
Solanum melongena
Gobar gas contains mainly
CH4 +Co2
CH4 + O2
CO2 + H2
CO2 + SO2
Which of the following is an opiate narcotic?
Barbiturates
Morphine
Amphetamines
LSD
Biological control component is central to advanced agricultural production. Which of the following is used as a third generation pesticide?
Insect repellants
Pheromones
Pathogens
Insect hormone analogues
Which of the following pesticides is an acetyl- cholinesterase inhibitor?
Y- BHC
Endosulfan
Malathion
Aldrin
Which one among the following chemicals is used for causing defoliation of forest trees?
Phosphon- D
Malic hydrazide
2,4 Dichlorophenoxy acetic acid
Amo- 1618
Which one of the following is non- symbiotic bio-fertilizer?
Azotobacter
Anabaena
Rhizobium
VAM.
Cellular totipotency was demonstrated by
Theodore Schwann
A.V. Leeuwenhoek
F.C. Steward
Robert Hooke
Farmers have reported over 50% higher yields of rice by using the bio-fertilizer________
Azolla pinnata
Cyanobacteria
Legume – Rhizobium symbiosis
Mycorrhiza
Haploid plant cultures are got from
Leaves
Root tip
Pollen grain
Buds
A cell coded protein formed in response to infection with most animal viruses is
Antigen
Antibody
Interferon
Histone
Obstacle to large scale transplantation of organs is
Insufficiency of organ donors
Immunological rejection of foreign bodies
Religious or ethnic considerations
Lack of effective surgical techniques
Which one of the sexually transmitted diseases is correctly matched with its pathogen?
Urethritis – Bacillus anthracis
Syphilis - Treponema pallidum
Gonorrhea – Entamoeba histolytica
Soft sore – Bacillus brevis
A sexually transmitted disease caused by bacteria is
Leprosy
AIDS
Syphilis
Pertussis
Sarcoma is cancer of
Epithelial tissue
Mesodermal tissue
Blood
Endodermal tissues
The alkaloid ajmalicine is obtained from
Altropa
Papaver
Curcuma
Sarpgandha