Which of the following features is unique to chordates?

A) bilateral symmetry
B) a coelom
C) a notochord
D) a complete digestive tract including an anus


Answer: C

Biology & Microbiology

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Which specialized cells receive and respond to stimuli?

A) effectors B) neurotransmitters C) neurons D) nerve impulses

Biology & Microbiology

The "big bang" that produced the universe is thought to have occurred

A) 40 to 50 billion years ago. B) 12 to 14 billion years ago. C) 4.6 billion years ago. D) 4 million years ago.

Biology & Microbiology

Which group of animals is the most recent to evolve?

A) reptiles B) amphibians C) invertebrates D) mammals

Biology & Microbiology

Studying the total amount of oxygen generated and released into the atmosphere by living things would be an example of studying ecology at which level?

A) ecosystem B) community C) population D) biosphere

Biology & Microbiology