This is an MCQ-based quiz for GRE on the topic of Ecology.
This includes organisms, communities, populations, and ecosystems.
A bacterium is found to survive off of organic molecules created by other organisms. It relies on these as both carbon and energy sources. Which term best describes this bacterium?
When measuring biodiversity, there are several possible indices to use, such as alpha diversity or beta diversity. What does beta diversity, or species evenness, measure?
What does a J curve represent on a population growth chart?
Which of the following most accurately describes a deme?
K-strategist populations are more commonly regulated by ____________ limiting factors, and r-strategist populations are regulated by ___________ limiting factors.
Detritivores employ an evolutionarily successful feeding strategy of animals, in which they feed primarily on other animals" waste. Why is this an efficient approach?
There are a huge number of herbivores in the world, with insects being the largest and most diverse group. Given how successful these herbivores are and how abundant their plant resources are, why haven"t all plants in the world been eaten by now?
Only 10% of the energy at each level of the trophic pyramid is available energy for the following trophic level. Why is so much energy lost between each level?
A species designated as "r-strategist" is characterized by all of the following except __________.
Eusocial insects, like many species of ants, are some of the most well known and successful social animals in the world. What factors are necessary for an insect species to be eusocial?
I. Cooperative brood care between different individuals
II. Division of labor by reproductive capability
III. Overlap of generations
IV. Adults care for their own offspring for some time
III and IV
I and II
I, II, III, and IV
I, II, and III