Explanation: Food web is more realistic due to the fact that we can add more organisms into the mix and show how they interact with each other in an ecosystem. In food chain we are just doing a small segment of about three or four animals in a basic food chain.

Explanation: Keystone species have low functional redundancy. Any organisms from plants to fungi can be a keystone species. They are not always most abundant species in an ecosystem. The way animals influence food webs varies from habitat to habitat.

Explanation: A food web consists of all the food chains in a single ecosystem. All the interconnected and overlapping food chains in an ecosystem make up a food web. Unlike a food chain, organisms in food web occupy more than one trophic level.

Explanation: In food web we find many different paths on plants and animals which are connected to each other. In food web producer are connected to consumers and consumers are connected to decomposers in a specific order.

Explanation: Food chain is a single linear pathway through which food energy and nutrients travel in the ecosystem while food web is number of interconnected food chains through which energy along with nutrients travels in the ecosystem.

Explanation: Most food webs on Earth derive their energy primarily from sunlight. This energy is captured by plants via photosynthesis and then distributed to the consumers in the environment. A food web used that energy and those energy proceeds to the succeeding organisms.

Explanation: In pond ecosystem, an algae which are a producer is a food for many organisms present in the pond. For example prawn, carp which are all primary consumers eat algae in order to get energy. Thus a single producer feeds many consumers.

Explanation: In grassland trophic level grass is the producer. Grasshopper belongs to primary consumer. Lizard which eats grasshopper belongs to secondary consumer. Hawk belongs to tertiary consumer since it eats lizards.

Explanation: In aquatic food web diatoms is phytoplankton where the food web process starts. Pteropods are zooplankton. Lantern fish is the filterers. Squid is the predator followed by marlin which is top predator in aquatic food web.

Explanation: In aquatic food web large sharks which is a top predator remains in the top level in trophic level. The order of trophic level in aquatic food web is phytoplankton->zooplankton->filterers->predators->top predator.

Explanation: Detritivores are heterotrophs that obtain their nutrition by feeding on decomposing plant and animals. Detritivores play an important role in all ecosystems by getting rid of decaying organic matter left behind by the organisms.

Explanation: Lion is considered as top predators or apex predators in the grassland ecosystem, because no other organisms hunt or kill lion for food. Usually, lion comes under tertiary or quaternary trophic level based on the food web.

Explanation: In the above example many mice and insects depend on acorns for food. Since many organisms depend on the particular organism or plant for food in order to get the energy they are known as food web.

Explanation: Food chain deals with one animal dependent on another. But in food web if one animal becomes extinct predators still have other sources of food. If they didn’t have this coping mechanism when one species went extinct everything that depends on it would die.