Which life-form existed on Earth for the shortest period of time?

dinosaurs

trilobites

ammonoids

placoderm fish

Which of the body's communication system operates the most quickly why

What Provides long-term energy storage for animals

Definition: This is the descent of different species from a common species over many generations.

A coproduct of living poplar trees that is used as an alternative to synthetic polymers is one type of

A substance, such as auxin, that is produced by a plant and affects how the plant grows and develops is best called

Which route represents the path taken by the European explorer Christopher Columbus? A) 1 B) 2 C) 3 D) 4

Which gas is the most abundant of the trace gases? A. nitrogen B. oxygen C. argon D. carbon dioxide

Describe the central dogma of molecular biology, briefly describe the processes of transcription and translation.

magine that the animal body produced sperm and eggs with mitosis instead of meiosis. What chromosome number would the autosomes of the third generation have if the first generation had four chromosomes

A well supported testable explanation of phenomena that have occurred in the natural world is called