A type of trilobite is used as an index fossil these fossils were made about 540 million years ago a scientist finds a trilobite fossils in layer 5 apex

What allows scientists to directly determine the age of the fossil itself

We sometimes show the amount of energy and matter in an ecosystem by level, with producers on the bottom and top consumers at the top.

Is pulmonary embolism an infectious or non infectious disease?

and compare the two types of deformation. How is ductile deformation different from elastic deformation?

The area of the brain that is crucial in expressing and regulating emotions is the

Urinary system keeps the pH of the blood around

You are attempting to recapitulate the transposon mutagenesis experiment without the benefit of counter selection due to unavailability of a DAP auxotroph Donor.

Which of the following is the primary function of proteins? A) transmits hereditary information from one generation to the next B) stored, concentrated energy C) builds and repairs cells and tissues in the body D) cushions and insulates organs

Which of the following best describes cell communication processes that are present in bacteria, yeast, and multicellular organisms?

During which phase of mitosis do the chromatids become chromosomes? a. telophase. b. anaphase. c. prophase. d. metaphase