Which of the following is the reason the cell theory is a theory?

a. a theory cant be proven

b. a law cannot be proven

c. a law has been disproven

d. a theory has not been disproven

Relative to wave propagation, what is the direction of displacement of the air particles of the medium in transverse waves?

Match each branch of science with its related carrier A.) earth science 1.) astronaut B.) physical science 2.) botanist C.) life science 3.) geophysicist D.) space science 4.) chemist

When you notice that someone has unusually blue eyes, you've noticed their A. genotype. B. allele. C. hybridization. D. phenotype.

A pyramid of energy can be used to illustrate the loss of usable energy at each feeding level in a food web. In which feeding level would the smallest amount of energy be found? autotrophs producers primary consumers secondary consumers

Capillaries are part of which body system? skeletal system nervous system digestive system circulatory system

The golgi apparatus (dictyosome) plays a major role in what cellular pathway?

What is the flotation method used to determine? Mass Density Volume Color

Fossil records suggest major changes in early vascular plants that favored the evolution of land plants. Which was one of these major changes? Select one of the options below as your answer: A. Development of fruit B. Development of seed C.

Many people in the developing world who depend on rice in their diet suffer from diseases related to deficiencies of

Why does biology have to be a subject