General Agriculture MCQ For Competitive exam-59

General Agriculture MCQ

# The use of X-ray irradiated flies for pest management is an example of:
a. Sterile male release

b. Neoplasia induction

c. Mutant proliferation

d. Environmental hazards

#What is the mode of action of organophosphate insecticides?
a. Chitin-synthesis inhibition

b. Mixed-function oxidase inhibition

c. Physical suffocation d. Acetylcholinesterase inhibition

e. Changing the ion permeability of membranes

(General Agriculture MCQ)

#More than 500 species of insects are currently resistant to one or more pesticides. How are insects able to resist the toxic action of pesticides?
a. Cross-resistance

b. Mixed-function oxidases

c. Behavioral adaptations

d. Physiological changes at the level of the target site

e. All of the above

# Ants are:
a. The largest group of social insects (ca. 9,000 described species)
b. The only social insects in the order Hymenoptera
c. The only group of insects to be found in the fossil record
d. a. and b.
e. None of the above

#The greatest threat to biodiversity in terms of the percentage of species affected is:
a. Habitat degradation

b. Disease

c. Overexploitation

d. Pollution

e. None of the above

(General Agriculture MCQ)

#Mutualisms have evolved between:
a. Ants and bees (particularly Africanized Honey Bees)
b. Ants and termites (e.g., the Formosan termite that has invaded Hawaii)
c. Ants and plant feeding insects that produce honeydew (e.g., aphids and scale insects)
d. Ants and plants that provide rewards in the form of food (e.g., extrafloral nectar)
e. (c ) and d.

(General Agriculture MCQ)

#The notion that preservation of one species (often a “charismatic” organism that acts as a “flagship species”) may aid in the preservation of many others is often called:

a. A „habitat saver‟

b. The „umbrella effect‟

c. the „conservation strategy‟

d. A „non-target effect‟

e. All of the above

#Current uses of genetically modified organisms include:
a. Glyphosate (Roundup) resistant plants

b. Insect resistant plants expressing the Bacillus thuringiensis (Bt) endotoxin gene

c. Enhanced microbial pesticides, e.g., baculoviruses expressing scorpion toxin genes

d. Production of vaccines

e. All of the above

(General Agriculture MCQ)

#Pathogen derived resistance refers to:

a. Use of Bacillus thuringiensis endotoxin against Colorado Potato Beetle

b. Use of genes from a virus to protect a plant from a very similar or homologous virus isolate

c. Coat protein mediated cross protection

d. a. and c.

e. b. and c.

#The highest, or most developed, form of sociality among insects is referred to as:

a. Subsocial

b. Semisocial

c. Eusocial

d. Communal

e. Quasisocial

(General Agriculture MCQ)

#Some of the evolutionary advantages of social behavior include:

a. Improved resource acquisition

b. Improved defense

c. Improved survival of offspring

d. reduced stinging requirements

e. a., b. and c.

#Worker honey bees in a colony:

a. Are all sterile females

b. Have the same mother

c. Are diploid

d. Are haploid

e. a., b. and c.

(General Agriculture MCQ)

#Honey bee caste determination is:

a. Is age related and regulated genetically and hormonally

b. Is regulated by photoperiod and temperature

c. Is regulated by the waggle dance

d. Is determined by pesticides in the environment

e. All of the above

#Termites differ from honeybees in that they:

a. Are haplo-diploid

b. Have no males

c. Are diploid

d. Have a fertile queen and king in each colony

e. c. and d.

(General Agriculture MCQ)

#Family of the Droscha magniferae:

a. Coccidae

b. Aleurodidae

c. Aphididae

d. Pyralidae

#The two most important structural insect pests in urban situations are:

a. Moths and butterflies

b. Spiders and scorpions

c. Beetles and flies

d. Termites and ants

e. None of the above

(General Agriculture MCQ)

#Family of the Emmalocera deprcsella:

a. Chrysomelidae

b. Pyralidae

c. Anobiidae

d. Noctuidae

#Family of the Spodoptera litura:

a. Chrysomelidae

b. Pyralidae

c. Anobiidae

d. Noctuidae

(General Agriculture MCQ)

#Family of the Pectinophora gossypiella:

a. Tenebrionidae

b. Noctuidae

c. Gelechiidae

d. Aphididae

(General Agriculture MCQ)

#Approaches to biological control tactics include classical, augmentative and conservation. Classical biological control is the:

a. Preservation of natural enemies (predators & parasitoids) that are already established in an area

b. Importation and release of an insect pest to a new area to provide hosts for natural enemies

c. Culture and release of natural enemies that are already established in the field, but that need a “boost” to effectively control the insect pest species

d. Importation and release of natural enemies from the native home of an alien insect pest that has invaded a new area

e. Use of chemical insecticides to reduce alien insect pests to establish new equilibrium position

#Family of the Bemisia tabaci:

a. Apionidae

b. Aleurodidae

c. Pyralidae

d. Pyrrhocoridae

(General Agriculture MCQ)

#An example(s) of a relative method to assess economic threshold levels for an insect pest is:

a. Number of insects per leaf

b. Number of insects per plant

c. Number of insects per twig

d. Pheromone traps

e. a., b., and c.

#Quarantine of an insect pest involves:

a. Eradication of the pest

b. Limit the movement of the pest

c. Cooperation of the public

d. b. and c.

e. a., b. and (c

(General Agriculture MCQ)

#The equilibrium level in an insect population:

a. Is the point at which insects can begin to migrate

b. Refers to fluctuations in the population around a mean

c. Is important in determining pest status

d. All of the above

e. b. and (c )

# Which chemicals do insects use to communicate messages at the following three levels, respectively: within the insect body, intra-specifically (between members of the same species), and inter-specifically (between members of different species)?

a. Hormone, PTTH, and tympanum, respectively.

b. Kairomone, pheromone and hormone, respectively.

c. Hormone, pheromone and allomone, respectively.

d. Juvenile hormone, PTTH and luciferin, respectively.

e. Kairomone, pheromone and allomone, respectively.

(General Agriculture MCQ)

#The honey bee waggle dance conveys information about the location of nectar sources to other worker bees in the hive. Which of the following senses do workerbees use to interpret the dance?

a. Sight.

b. Smell.

c. Taste.

d. Touch.

e. b., c. and d. only.

# What is the insect auditory sense structure that detects sound (analogous to the human ear) called?

a. Lek.

b. Antenna.

c. Kairomone.

d. Tympanum.

e. Luciferin.

(General Agriculture MCQ)

#Insects can create vibrations that are transmitted through a substrate:

a. That send very specific intraspecific messages, e.g. courtship songs.

b. And used for efficient intraspecific communication over short distances.

c. That represent a secure means of intraspecific communication.

d. And attract mates from great distances, well over a mile.

e. a., b. and c.

# The honey bee worker has a “stinger” which
a. Is a modified ovipositor and associated with a poison gland that produces the venom.

b. Has a barb on it which can imbed into the skin and be released by muscles to allow the bee to sting another victim.

c. Has a barb on it which can imbed into the skin of an animal and is left behind to continue injecting venom into the victim.

d. a. and b..

e. a. and c.

(General Agriculture MCQ)

#Bubonic plague is:
a. Present in rodent populations along with its efficient louse vector in the Sierra Mountains of California.
b. Present in bear populations along with its efficient flea vector in the Sierra Mountains of California.
c. Present in rodent populations along with its efficient flea vector in the Sierra Mountains of California.
d. No longer a threat because the flea vector has been eradicated with chemical insecticides in the Sierra Mountains of California.
e. No longer a threat because the louse vector has been eradicated with chemical insecticides in the Sierra Mountains of California

#Examples of some density-independent mortality factors in insect populations are:
a. Predators, parasitoids, and pathogens.
b. Predators, chemical insecticides, and intraspecific competition.
c. Chemical insecticides, hurricanes, and temperature extremes (i.e., hot and cold)
d. Chemical insecticides, flooding, and intraspecific competition.
e. Chemical insecticides, flooding, and predators.

(General Agriculture MCQ)

Read More-