Two characteristics used to define mammals include

a. mammary glands and scales.

b. mammary glands and hair or fur.

c. mammary glands and sweat glands.

d. sweat glands and a four-chamber heart.

List four catastrophic events:

Which of the following is not a property of a base? feel slippery to the touch change red litmus to blue have a sour taste produce oh - ions

What is the biological significance of the light-independent reactions of photosynthesis?

An environmental change causes the contractile vacuoles of a paramecium to stop functioning, while most of the other cell structures appear to be unaffected. Which environmental change would most likely produce this result?

Which is the only reason to take an anabolic steroid?

Which statements about a child with brown eyes must be true? Choose more than one answer

I observe that squirrels that live in the southeastern United States are much thinner than squirrels that live in the northeastern part of the country.

66) homologous chromosomes move toward opposite poles of a dividing cell during; a) mitosis.; b) meiosis i.; c) meiosis ii.; d) fertilization.; e) binary fission.

What is true about gradualism with respect to punctuated equilibrium

Which statement is true? A. Prokaryotic cells do not have a membrane. B. Eukaryotic cells have multiple membranes. C. Eukaryotic cells have one membrane. D. Prokaryotic cells have multiple membranes.