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Answer: c) and b) are correct.
The brain is encased in a protective bony or cartilaginous housing in craniates.
The anterior end of the nerve cord is elaborated to form a brain in craniates.
Explanation: The craniates include the chordata with well-defined heads. This includes mammals, reptiles and fishes. So we can discard the other answers. Because most craniates have functional jaws, and the adults do not lose their chordate characteristics. The last one does not apply as a specific feature because the tunicate have neural crest but are not recognized as craniata.
Hawaii is included in Oceania
Explanation:
Hawaii is the constituent state of USA. It became the 50th US state on 21 August 1959. It is famous for volcanic island. Honolulu is capital of Hawaii. The Honolulu is on the Oahu island. Hawaii island lie 2397 miles from San Francisco, California. It is economically vigorous state.
Mauna Loa and Mauna Kea are the highest mountains of Hawaii island. Niihau, Lanai, Kahoolawe, Molokai, Maui, Kauai, Oahu, and Hawaii are eight major island which is eastern end of chain
The answer is catastrophism.
Catastrophism is a theory explaining that the Earth has been affected by sudden catastrophes which created its geological features. Some of the proposed catastrophes is a global flood followed by an uplifting of some rock which happened sudden, in a short period of time. It is opposite theory to uniformitarianism which explains that the Earth was formed in slow changes.
Answer:
D) Even a slight reproductive advantage will eventually lead to the elimination of the less well adapted of two competing species.
Explanation:
The competitive exclusion describes relationship between two species that compete for the limiting sources, and cannot coexist. It is enough for one species to have slightly advantage to be dominant over the other. As a consequence, other species (the weaker one) will be extincted (shift to a different ecological niche).
