Why are ancient volcanic ash deposits important to geologists?

Define the first stage of a scientific investigation-observation

A scientist collected samples of organisms from a local stream. what was the scientist testing?

Some technologies have a number of negative effects. which is a negative outcome of the technology of pesticides A-increased food supply B-harmful to humans if used improperly C-cheaper food D-creation of more jobs

The portion of the membrane system in eukaryotic cells that is responsible for the making lipids and breaking down toxic substances is the

Based on the reading, how do you think the Hawaiian Island chain formed? Be sure to mention the initial formation of the island and the direction the Pacific Plate is moving

When there is a well-established segment of heterochromatin on an interphase chromosome, there is usually a special barrier sequence that prevents the heterochromatin from expanding along the entire chromosome.

What does the theory of evolution tell us about living things? Group of answer choices The environment can make them change rapidly over a short period of time. They create fossils when they die. Their environment makes them change slowly over time.

On the conditions tab select fishing. Set net fishing to 50%. Click advance year 10 times. What changes do you notice on the coral reef?

The insulin used to treat people with diabetes is commonly produced by intserting the DNA sequence for human insulin into a bacterium. The insulin the bacterium produces using that sequence is then harvest.

Joshua cut his knee while rock climbing. The next day, the cut was red and swollen, and pus was present in the area of the cut. What caused the pus to form? A. macrophages excreting medicinal material B. the death of macrophages C.