What did organic polymers form when they joined together on earth

What physical property of the soil is rough

The freshwater and salt water biomes are divided into different levels or zones. What are these levels or zones, and if stated, what kinds of organisms live in the different levels or zones? (Site 1)

A breeder performs a test cross to determine the genotype of a black cat. he crosses the black cat (BB or Bb) with a white cat (bb). if 50 percent of the offspring are black, what is the genotype of the black cat

What is the main function of the Krebs cycle? A. To produce large numbers of ATP molecules B. To break glucose down into two pyruvate molecules C. To provide molecules for the electron transport chain D.

What will a hypothesis become if it is supported by repeated experimentation

Which are sources of adult cells? check all that apply. A. bone marrow B. amniotic fluid C. brain D. gametes E. liver F. embryo

True or false growth of an organism does not necessarily mean an increase in size.

Which words means to be actively opposed to society

What is technology? A. A method for doing scientific research B. Science applied to practical problems C. A system of government D. The use of science to answer ethical questions

If there is a mutation, and the wrong amino acid is put into sequence, what is the result?