organisms and population
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organisms and population - Leaderboard
organisms and population - Details
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57 questions
| 🇬🇧 | 🇬🇧 |
| Territoriality occurs as a result of | Competition |
| July 11th is observed as | World population day |
| What is the formula for growth rate | Birth+immigration- death+emmigration/total no.of population |
| Leaf butterfly and stick insects show mimicry to dodge their enemy using mimicry, what is it? | Mimicry is a method to aquire body colour blending with the suroundings |
| Species are groups of potentially interbreeding natural populations which are isolated from other such groups | Distinctive morphological characters are displayed due to reproductive isolation |
| Large woody vines are more commonly found in | Tropical rainforests |
| Adaptaion to environment in desert lizards | Burrowing in soil to escape high temperature |
| Adaptations in kangaroo and rat | They feed on dry seeds and do not require drinking water. they excrete very concentrated urine and do not use water to regulate body temperature |
| Are coniferous trees evergreen | Yes coniferous trees are evergreen |
| What is a prairie | They are enormous streches of flat grassland with moderate temperatures, moderate rainfall, and few trees |
| Cause of mimicry is | Concealment |
| The high boiling point of water is advantageous to living organisms because | Organisms can easily boil off enough water to keep themselves cool |
| Xeric environment is characterised by | Low atmospheric humidity |
| Homeostatis is | Tendency of biological systems to resist change |
| Deep black soil is productive due to high proportion of | Clay and humus |
| Rhodospirillum is a | Bacteria |
| A sedentary sea anemone gets attached to the shell lining of hermit crab. the association is | Commennsalism |
| A high density of elephant in an area can result in | Intra specific competition |
| Two forces operate in the growth and development of every population. one of them relates to the ability to reproduce at a given rate. the force opposing it is called. | Environmental resistance |
| In a population unrestricted reproductive capacity is called as | Biotic potential |
| What is the correct sequence of stages of growth curve for bacteria | Lag,log,stationary and decline phase |
| The semilog of per minute growing bacteria is plotted against time. what is it's shape? | Ascending straight line |
| Name some insectivorous plants | Utricularia, drosera, dionaea |
| Exponential growth of cells is a characteristic feature of | Tissue culture cells |
| A pair of insectivorous plants is | Nepenthes and bladderword |
| Human population in india | Can be regulated by following the national programme of family planning |
| Vivipary is a characteristic of | Halophytes |
| NA | NA |
| What is the interaction between orchid and mango | Commensalism |
| The growth of a population without limit at its maximal rate and also that, rates of immigration and emigration are equal, then it is called | Biotic potential |
| Veldts of africa and pampas of south africa are | Grassland biomes |
| Savannah are | Grasslans with scattered trees |
| 5th june is celebrated as | World environment day |
| Range of latitudes for temperate region is | 40 degree to 60 degree |
| Plants growing on sandy soil, are grouped under | Psammophytes |
| A population growing in a habitat with limited resources shows four phases of growth in which sequence | Lag-phase-acceleration-deaceleration-asymptote |
| It represents trophic position of a species | Ecological niche |