The right answer is option d as its absence would impact many organisms in the ecosystem.
Keystone species are crucial for the ecosystem's health. If such a species were to disappear from an ecosystem, it would disrupt the ecosystem's functioning, leading to significant consequences. Therefore, keystone species are vital for the ecosystem's survival.
Response:
Fungi, Animalia, Plantae, and Protista
Explanation:
Fungi: A group of organisms that produce spores and feed on organic materials, including examples like Mushrooms, molds, and yeast.
Animals: A category of living beings that generally possess organs, consume other organic materials, and most often have a nervous system. Examples include Pigeons, Lions, Whales, etc.
Plants: Organisms such as grass, trees, moss, flowers that grow at a fixed location. They take in water and inorganic substances through their roots and usually exhibit green pigmentation to perform photosynthesis.
Protists: These typically microscopic, unicellular organisms contain a nucleus and distinct organelles. Some have the ability to move, while others like algae remain stationary and conduct photosynthesis.
Lycopodium is part of a group of plants known as fern allies. They are primarily non-flowering plants characterized by their extensively branched structure, featuring small and simple, needle-like leaves that densely cover the branches and stem. In contrast, Equisetum, commonly referred to as horsetail or snake grass, resembles a horse's tail and is the sole surviving genus within the Equisetaceae family, known for vascular plants that reproduce using spores instead of seeds.
