Which of the following statement is false?
(1) Osmoconformors are able to maintain homeostasis by physiological means or sometimes behavioural means also which ensure constant body temperature, constant osmotic concentration etc
(2) All birds and mammals, and a very few lower vertebrates and invertebrates are capable of osmoregulation and thermoregulation
(3) Thermoregulation is the major reason of the success mammals
(4) Sweating and shivering are the means of thermoregulation by humans
I. Thermoregulation, osmoregulation and excretion are mechanisms that moderate change in the body.
II. 99% animals and almost all plants are conformers
III. Heat loss or heat gain is a function of surface area.
IV. Thermoregulation energetically least expensive process for many organisms like shrews and humming birds
V. 99% animals are thermoregulator
VI. Archaebacteria cannot tolerate high temperature
(1) I and II are wrong
(2) IV, V and VI are wrong
(3) None is wrong
(4) All are wrong
Why small animals are not found in polar area mostly?
(1) Because they have a smaller surface area relative to their volume
(2) Because they have a larger volume relative to their surface area
(3) Because they have a smaller metabolic rate
(4) Because they have a larger surface area relative to their volume
Find out false one:
(1) Mammals from colder climate generally have shorter ears and limbs to minimise heat loss
(2) All organisms have behavioural adaptations that allow them to respond quickly to a stressful situation
(3) Some organisms possess adaptations that are physiological which allow them to respond quickly to a stressful situation
(4) A large variety of invertebrates and fish live at great depths in the ocean where the pressure could be > 100 times than the normal atmospheric pressure
Which of the following statement is false with respect to adaptations?
(1) Many xerophytic plants have thick cuticle on leaf epidermis, sunken stomata
(2) Some xerophytic plants have special photosynthetic pathway (CAM) that enables their stomata close during day
(3) Opuntia has spines (modified leaves), photosynthetic phylloclade (stem)
(4) All adaptations are genetically fixed all organisms
The figure given below is a diagrammatic representation of response of organisms to abiotic factors. What do (i), (ii) and (iii) represent respectively?
(i) | (ii) | (iii) | |
(1) | Conformer | Regulator | Partial regulator |
(2) | Regulator | Partial | Conformer regulator |
(3) | Partial | Regulator | Conformer regulator |
(4) | Regulator | Conformer | Partial regulator |
Which of the following is best suited with the abiotic factor temperature, playing role in changes in the physicochemical environment of different habitats?
1. The average temperature of land is approximately 50 throughout the year
2. The temperature of temperate countries is very much favorable for mango trees
3. Temperature affects the kinetics of enzyme and hence the basal metabolic activity of the body
4. Both 1 and 2
Aquatic organisms face problems when water quality gets disturbed. Here water quality includes
1. Chemical composition, temperature, pH
2. Chemical composition and pH
3. Only pH
4. pH and temperature
The salt concentration of water bodies is measured in
1. Parts Per Thousands
2. Parts Per Million
3. Parts Per Billion
4. Parts per Hundreds
Light as an abiotic factor is important
1. For photosynthesis and flowering only
2. Foraging, reproductive and migratory activities of animals
3. A and B both
4. Only for autotrophs