Practice free Organism and Population (Botany) NEET multiple-choice questions online with instant answers and detailed explanations. No login required.
A community includes (CET-98)
A community in ecology refers to different populations of organisms that interact with each other in a specific area. This includes various species living together and interacting through various relationships like predation, competition, and symbiosis.
What is responsible for change in the size of population of any particular area ?
The size of a population in any particular area is influenced by multiple factors, including the availability of food, predation, and environmental pressure. All three factors interact to determine how a population grows or shrinks over time. Therefore, the correct answer is 'All three'.
In one forest maximum 500 lions can be allowed with than what does 500 indicate ?
The term 'carrying capacity' refers to the maximum number of individuals of a particular species that an environment can support sustainably. In this context, the number 500 represents the carrying capacity of the lion population in the forest.
S= Statement R= Reason S: The loranthus plant possess nodules on their root system R: Rhizobiumbacterialive in root nodules
Loranthus is a parasitic plant and does not possess root nodules. Rhizobium bacteria live in the root nodules of leguminous plants, not in Loranthus. Therefore, the statement (S) is false and the reason (R) is true.
What is true for the following statements ? Statement X : Migration of birds is influenced bylight. Statement Y : Reproduction of birds is influenced bylight. Statement Z : In all birds gonads are activated due to increase in intensity of light during summer.
Which is the example of intraspecific competition for food ?
In snakes realised (actual) natality is less thanpotential natality; because.....
The actual natality (birth rate) in snakes is often less than the potential natality due to multiple factors. Not all eggs are incubated successfully, environmental resistance (like predation and disease), and even if eggs are incubated, many offspring do not survive to adulthood. Hence, all these factors contribute to a lower realized natality.
Select the correct statement for a population growing in a habitat with limited resources
In a habitat with limited resources, a population typically exhibits logistic growth. This is characterized by an initial lag phase, followed by a phase of acceleration (exponential growth), then deceleration as the population reaches the carrying capacity of the environment, and finally stabilizes at an asymptote. This results in an S-shaped or sigmoid curve, not a J-shaped curve.
Flowers in Ravenela are pollinated by
The flowers in Ravenala, also known as the traveler’s tree, are pollinated by lemurs. These primates are attracted to the nectar and aid in the pollination process by transferring pollen as they move from flower to flower.
Average human population in a certain time area is 5000 in which 1111 children are produced during an years, find out the birth rate ?
The birth rate is calculated as the number of children born per 1000 individuals in a population per year. Given the population of 5000 and 1111 children born, the birth rate can be calculated as: \[\text{Birth Rate} = \frac{1111}{5000} \times 1000 = 222.2 \text{ births per 1000 individuals per year (or 0.2222)}\].
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