Which Ecdysozoan phylum contains three-quarters of the known animal species?

a. Nemertea
b. Annelida
c. Arthropoda
d. Nematoda


Ans: c. Arthropoda

Biology & Microbiology

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The soil in a particular area is arranged in layers called horizons that vary in texture, structure, and consistency from one another

Indicate whether the statement is true or false

Biology & Microbiology

The study of behavior in natural environments from an evolutionary perspective is called:a

ethology. b. animal behavior. c. behavioral ecology. d. behavioral ethology. e. direct fitness.

Biology & Microbiology

Why is the process of peer review critical to scientific inquiry?

a. It protects scientists from being sued. b. It gives scientists a patent for their ideas and methods. c. It helps ensure that the research in a scientific paper is original, significant, logical, and thorough. d. It provides a venue where scientists can publish their materials and protocols for use by other scientists who want to do the same research.

Biology & Microbiology

Clues from geology and paleontology suggest that simple cells or their precursors arose about.

A. six billion years ago. B. six million years ago. C. four billion years ago. D. four million years ago. E. one million years ago.

Biology & Microbiology