Why do neurons and some other specialized cells divide infrequently?

What is produced by the lymph system? -Antigens -Lysozymes -White blood cells -Bacteria

What is the nerve filber that enables communication between the right and left cerebral hemispheres called?

Where is wind a primary source of erosion? A. temperate forests B. deserts C. caves D. tropical rain forests

Darwin theorized that evidence for the evolution of new species can be found in homologous body structures. Which observation supports this theory? A.

If a dna molecule is made up of 30% thymine what percent of it would be guanine

What hormone stimulates the release of aldosterone by the adrenal cortex and constricts the blood vessels?

Which is a type of star system? A. dim stars B. galaxies C. wobbling stars D. globular clusters

two population of finches live on separate islands and rarely move from one island to another this is an example of

In humans, black hair (B) is dominant over red hair (b) and having six fingers (F) is dominant over having five fingers (f). Sally has black hair and five fingers. Her father has red hair. Sally marries Bill who has red hair and six fingers.

Which group of elements shares characteristics with both metals and nonmetals?