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- Multiple ChoicePlease save your changes before editing any questions.Which of the fallowing has only abiotic factors?Sunlight, algae, and temperatureGuppy, crab, oxygenSunlight, soil, and weatherAlgae, temperature, and dog
- Multiple ChoicePlease save your changes before editing any questions.
In population ecology, one of the factors that is studied is a density-dependent factor. Density-dependent factors have the greatest effect on dense populations and little or no effect on very sparse populations. What would NOT be an example of a density-dependent factors?
Parasitism
Predation
The average rainfall of a region
Communicable disease
- Multiple ChoicePlease save your changes before editing any questions.
The carrying capacity of the water flea Daphnia in a laboratory culture medium is 130/mL. A research adds a fixed amount of nutrients to the medium every day to maintain their concentration. The research decides to increase the amount of nutrients that are added daily to the culture. How will this increase impact the carrying capacity of Daphnia in the medium?
The carrying capacity will remain unchanged
The carrying capacity will decrease
The carrying capacity will decrease and then become constant
They carrying capacity will increase
- Multiple ChoicePlease save your changes before editing any questions.Which terms best describe heterotrophs?Plants; producersAnimals; producersPlants; consumersAnimals; consumers
- Multiple ChoicePlease save your changes before editing any questions.
Refer to the food web shown in the figure. Which organism is correctly classified as a primary consumer?
Grasses
Frog
Snake
Grasshopper
- Multiple ChoicePlease save your changes before editing any questions.
This food chain can be found in the coastal waters of Virginia. The population of which organisms in the food chain would be the first to decline if commercial fishing over-harvested shrimp?
Algae
Damselfish
Zooplankton
Barracuda
- Multiple ChoicePlease save your changes before editing any questions.
The figure shown displays the biomass within a food pyramid. How much energy is most likely available at the grasshoppers' trophic level?
1,000 kg
900 kg
9,000 kg
10 kg
- Multiple ChoicePlease save your changes before editing any questions.
Wild pigs eat leaves, plant roots, flowers, lizards, and snakes. They are classified as...
producers
omnivores
herbivores
scavengers
- Multiple ChoicePlease save your changes before editing any questions.What are examples of pioneer species in a primary succession?Bushes and ShrubsOak treesMossess and LichensA rose Bush
- Multiple ChoicePlease save your changes before editing any questions.
The nitrogen found in the atmosphere is not in a form that plants and animals can use. What converts the nitrogen into a useable form?
Photosynthesis
Decomposition of organisms
Fungi
Bacteria