A real or perceived challenge or threat which causes the body to produce a response is a(n)
1.injury
2.phobia
3.stressor
4.frustration
After reaching the ovary, pollen tube does not display this of the following events
1.may enter the ovule through chalaza
2.enters one of the synergids through filiform apparatus
3.enters the ovule through the micropyle
4.chemotactic movement of pollen tube towards synergid
After trying for several years, a couple finally learnt that they are going to have a baby. They are experiencing this type of stress
1. Strain
2. Anxiety
3. Distress
4. Eustress
Aleurone layer participates in
1.enzyme synthesis
2. transfer of food to cotyledons
3. is also known as scutellum
4.protection of delicate embryo
All of the following is true about the hormone epinephrine except that it
1.is released by the pituitary gland
2.is also known as adrenaline
3. is secreted by the adrenal gland
4.prepares the body for action
 Fight or flight reactions causes the activation of
1. the parathyroid glands, leading to increased metabolic rate
2.adrenal medulla leading to increased secretion of epinephrine and norepinephrine
3.pancreas leading to a reduction in the blood sugar levels
4.the kidney, causing suppression of the renin-angiotensin-aldosterone pathway
 The external conditions required for seed germination are
1. light, moisture and appropriate temperature
2.oxygen, carbon dioxide and appropriate temperature
3.oxygen, light and appropriate temperature
4.oxygen, moisture and suitable temperature
 The fungi which derive their food directly from dead organic matter are known as
1.Predators
2. Decomposers
3.Mutualists
4.Parasitic fungi
 The primary hormone responsible for stress-related physiological responses, such as an increase in heart rate is
1. insulin
2. cortisol
3. epinephrine
4. thyroxin
 This group is used to represent pathological fungi
1.Penicillium
2.Truffles, mushrooms and morels
3.Smuts, rusts and moulds
4.All of the above
 Which of these entities is an indicator of the SO2 pollution of air?
1. Puffballs
2.Mushrooms
3.Mosses
4.Lichens
Biodiversity loss can lead to everything except this
1. increased resistance to the environmental perturbance
2.a decline in plant production
3.increased variability in water use
4.increased variability in pest and disease cycle
Both geitonogamy and autogamy are prevented in
1.Cucumber
2. Papaya
3. Mazia
4.Castor
Covered smut of Sorghum is caused by
1.Sphacelotheca sorghi
2. Sphacelotheca cruenta
3. Sphacelotheca reiliana
4.Tolyposporium ehrenbergii
Death angel/death cap (amanita) and Jack O Lantern mushroom are all examples of
1. Poisonous mushrooms
2. Edible mushrooms
3.None of the above
4.Both (a) and (b)
Indri-indri lemur is found in
1.India
2.Sri lanka
3. Madagaskar
4. Mauritius
This is the correct sequence for artificial experiment in bisexual flowers
1.Self-pollination -> Bagging -> Emasculation -> Rebagging
2.Cross pollination -> Bagging -> Emasculation -> Rebagging
3. Emasculation -> Bagging -> Cross pollination -> Rebagging
4.Bagging -> Emasculation -> Cross pollination -> Rebagging
One of the endangered species of the Indian medicinal plants is
1.Garlic
2. Ocimum
3.Nependenthes
4.Podophyllum
Oyster mushroom is an example of predator fungi that attacks
1.Tapeworms
2.Pinworms
3.Platyhelminthes
4. Roundworms
Pick the correct match
1.Stratification – Population
2.Aerenchyma – Opuntia
3.Age Pyramid – Biome
4. Parthenium hysterophorus – a threat to biodiversity
Plant species on the verge of extinction as a result of over-exploitation is
1.Gloriosa
2.Centella
3.Podophyllum
4.All of the above
Presence of plants organised into well defined vertical layers based on their heights can be best observed in
1.grassland
2.tropical savannah
3.tropical rain forest
4.temperate forest
Sacred groves are useful in
1.Preventing soil erosion
2.generating environmental awareness
3.conservation rare and threatened species
4.year-round flow of water in rivers
Siberian crane is a regular visitor of bird sanctuary
1.Bharatpur (Rajasthan)
2.Ranaganathittu (Karnataka)
3. Lalbagh (Karnataka)
4.Vedanthangal (T.N)
Species very near to extinction if conservation measures are promptly not take up are
1.Rare species
2.threatened species
3.endangered species
4.vulenrable species
The following practice has led to the maximum damage to the diversity of Indian forests
1. Block cutting
2.Selective harvesting
3.Jhum cultivation
4.Taungya cultivation
The fungal disease – the black rust of wheat is caused by
1.Melampsora lini
2.Claviceps purpurea
3.Puccinia graminis tritici
4.Albugo candida
The hormone released by the adrenal glands allows the body to make energy more readily available from the stored nutrients
1. ACTH
2. Cortisol
3.Epinephrine
4.Norepinephrine
The hot spots of biodiversity are characterized by:
1.low endemicity and low threat of extinction
2. low endemicity and high threat of extinction
3.high endemicity and low threat of extinction
4. high endemicity and high threat of extinction
The main difference between the ‘Sixth extinction’ and the previous five extinctions is that, the sixth extinction
1. mainly affects plants
2.mainly occurs on islands
3. occurs at a faster rate
4.is exclusive of human activities
The most important reason for biodiversity loss in today’s age is
1.over-exploitation
2.co-extinctions
3.alien species invasions
4.fragmentation and habitat loss
The National aquatic animal of India is
1.Sea horse
2.River Dolphin
3. Blue whale
4.Gangetic shark
The pollen tube releases the two male gametes into the
1.the cytoplasm of antipodal cells
2.one male gamete in cytoplasm of synergids and other in cytoplasm of central cell
3. both in cytoplasm of central cell
4.both in cytoplasm of synergids
The region of biosphere reserve that is protected legally, where no human activity takes place is known as
1.transition zone
2.buffer zone
3.core zone
4. restoration zone
This branch of science investigates the relationship between stress and the nervous and immune systems
1.Neurolinguistics
2.Sociology
3. Adaptive immunology
4.Psychoneuroimmunology
This endangered animal is the source of the world’s finest, lightest, warmest and the most expensive wool – the shahtoosh
1.Cheetal
2.Kashmiri goat
3.Nilgai
4. Chiru
This fungi division includes ‘Club fungi’
1.Zygomycota
2.Deuteromycota
3.Basidiomycota
4.Ascomycota
This group of vertebrates comprises of the highest number of endangered species
1.Fishes
2.Birds
3. Reptiles
4. Mammals
This hormone is produced under condition of stress which stimulates glycogenolysis in the liver of human beings
1.Insulin
2.Thyroxin
3.Estradiol
4.Adrenaline
This is not under situ conservation
1.Botanic Garden
2.National park
3.Statuary
4.Biosphere reserve
This part of the autonomic nervous system provides the body with energy for the fight-or-flight response
1. Central nervous system
2.Sympathetic nervous system
3.Peripheral nervous system
4.Parasympathetic nervous system
This statement is incorrect
1.the seed dormancy is the internal or innate inhibition of generation of normal or viable seeds
2.embryo in the dormant seeds show higher rate of general metabolic rate
3.because fo dormancy seeds remain viable for long durations and can be stored
4. as the seeds mature, its water content is reduced and seeds become relatively dry
This will lose its economic value if fruits are produced through parthenocarpy
1.Banana
2.Citrus
3. Pomegarante
4. Grape
What does ‘Perfect stage’ of a fungus indicate?
1.indicates that it can reproduce asexually
2. indicates that it is perfectly healthy
3. indicates that it is able to form perfect sexual spores
4.All of the above
What is the name of the special hyphal tips through which parasitic fungi absorb nutrients directly from the cytoplasm of the living host?
1. Haustoria
2.Mildew
3.Constricting ring
4.All of the above
When danger or stress is perceived/experienced, this response occurs in the body
1.Exhaustion
2.Adaption
3.Fight-or-flight
4.Resistance
When dioecious plants are considered for artificial hybridization, this step would not be relevant
1. collection of pollen
2. bagging of female flower
3.dusting of pollen on stigma
4.emasculation
Which of these is not a reason accounting for greater biodiversity of tropics?
1.more niche specialization
2. availability of more solar energy
3. more time for species diversification
4.large seasonal variations in environmental factors
Which of these is related to Ex-situ conservation of threatened plants and animals?
1.Biodiversity hotspots
2. Wildlife safari parks
3. Amazon rainforest
4.Himalayan region
Who first used artificial hybridization in fruit crops?
1.Karpocho
2.Knight
3.Jones
4.Mendel