The movement of a bird away from a grass fire is caused by

A) receptors initiating a stimulus

B) impulse forming in a muscle tissue

C) muscles responding to a stimulus

D) effectors synthesizing neurotransmitters

What is the theory of punctuated equilibrium? a) It describes one way that new species arise. b) It explains why mass extinctions occur. c) It describes the rate of geologic time. d) It explains how domestic animals evolved.

Which of these is an example of the earth changing slowly a. hurricane b. forest succession c. volcanic eruption d. flooding

While most of the cells in a hair are dead, the living epithelial cells are found in?

What are renewable energies

What are the functions of thymus?

As ocean depth increases, pressure increases, and temperature decreases. True False

What conditions are needed for an accurate radiometric date to be obtained from a mineral sample?

What covers the ends of bones in adults? A blood B cartilage C marrow D ligaments

If gene expression control occurs during transcription, when did it occur?

If selfing starts in a previously randomly mating population composed of 0.50 heterozygotes, what is the frequency of heterozygotes after three generations of selfing