Why are some fossils found in lower layers and not upper layers? (give 2 answers of why this is)

Which class of vertebrates is considered to be the first to develop lungs, allowing them to become terrestrial organisms? A) Reptilia B) Aves C) Mammalia D) Amphibia

Which of the following produces NADH, ATP, and two pyruvate molecules

Gene's that are located on the? Chromosome are called?

What are whole organisms?

The presence of which element would indicate that a star is going through a high-mass star life cycle as opposed to a low-mass star life cycle? A) hydrogen B) carbon C) helium D) iron

The third level of cell organization is the tissue level system level o organism level o organ level

How is incomplete dominance different from a dominant and recessive relationship?

Games like tag and hide and seek are examples of: A: Constructive play B: Fantasy play C: Creative play D: Motor play E: Parallel play

Explain in a complete sentence why it is important for scientists to share information with one another.

The DNA message depends on the order of the a. nitrogen bases. b. acids. c. sugars. d. genes.