Which one or more of the following processes has/have resulted in increased greenhouse gases in the atmosphere over the last 100 years?
Show Hint
- Increasing levels of \( N_2 \) in the atmosphere due to increased denitrification.
- Increased release of \( CO_2 \) into the atmosphere due to the burning of fossil fuels.
- Increased release of methane into the atmosphere due to livestock.
- Increased release of methane from wetlands soil.
The Correct Option is B, C, D
Solution and Explanation
Step 1: Analyze the contribution of \( CO_2 \) from fossil fuels. The burning of fossil fuels is a major source of \( CO_2 \), significantly impacting global climate change.
Step 2: Consider the methane emissions from livestock. Methane, a potent greenhouse gas, is emitted in large quantities from the digestive processes of ruminant livestock.
Step 3: Evaluate methane release from wetlands. Natural wetlands are significant sources of methane due to anaerobic decomposition processes in their soils.
Top GATE EY Applied Ecology & Evolution Questions
- In a population of 534 blue sheep, there are two alleles, P and Q, at an autosomal locus. Allele P has a frequency of 30%. The number of sheep with the QQ genotype is 262. Assuming that this population is at Hardy-Weinberg equilibrium, the expected percentage of sheep with the PQ genotype in the population is:
- GATE EY - 2025
- Applied Ecology & Evolution
- hardy-weinberg principle
- Fly larvae of a species feed simultaneously on a shared rotting fruit. If the density of fly larvae is high, then all the larvae grow up to be smaller sized adults than if the larval density were low. Which one of the following processes best describes this observation?
- Which one of the following mechanisms is expected to generate tightly linked genes?
- Which one or more of the following conditions is/are necessary for the evolution of increased nectar production in an insect-pollinated plant via natural selection?
- GATE EY - 2025
- Applied Ecology & Evolution
- Evolutionary Biology
The population of whirligig beetles in a lake grows or declines exponentially, i.e., \( N(t) = N(0)e^{rt} \), where \( N(t) \) is the population size at time \( t \), \( N(0) \) is the initial population size, and \( r \) is the per capita rate of population change, occurring only due to birth and death.
A researcher tracks population sizes for a year and finds the following:
Assuming that the individual birth rates remain constant throughout the year and only death rates are affected, which one or more of the following statements is/are true?
Top GATE EY Questions
- During the process of succession in a community, species that are good colonisers are gradually replaced by species that are good competitors. Which one or more of the following statements is/are consistent with this pattern?
- GATE EY - 2026
- Ecological Succession
An ornamental shrub species was brought from Japan in the early 1800s to India, where it was planted frequently in gardens and parks. The species persisted for many decades without spreading, and then began to spread invasively fifty years ago. Which one or more of the following processes could have led to it becoming invasive?
- GATE EY - 2026
- Ecology
- Observations of algal species showed that their diversity was higher in pools where there were grazing snails compared to pools without snails. Which one of the following statements best explains this result?
- GATE EY - 2026
- Species-Area Relationships
Which one or more of the following is/are greenhouse gas(es)?
- GATE EY - 2026
- Ecology and Climate Change
- One hypothesis for why the tropics have far greater species richness than higher latitudes is that the tropics are relatively aseasonal. Low seasonality can encourage high species richness through which one or more of the following mechanisms?
- GATE EY - 2026
- Ecology