Tunicates are invertebrates. However, they are in the phylum Chordata because rhey have dorsal nerve cords and notochords.
Answer: Mechanical weathering breaks rocks into smaller pieces without changing their composition and chemical weathering breaks down rocks by forming new minerals that are stable at the Earth's surface.
Answer: A COMMUNITY
Explanation:
A biotic community, also known as a biota or ’biocoenosis’, is the group of ORGANISMS of two or more different species that live together and interact with each other within an environment or habitat. Together, the biotic community and the physical landscape or abiotic factors make up an ECOSYSTEM.
A group of organisms constitute POPULATION. But when several populations share a common habitat and its resources, they interact among themselves and develop into a biotic community or simply, a community.
Answer: A. New species can appear gradually through small changes in an ancestral species
Explanation:
