About how often do Earth's magnetic poles reverse?

O

A. Every 22 years

O

B. Every 100 million years

O

C. Every billion years

O

D. Every 250,000 years

What transport is the movement of materials from lower concentration to higher concentration as in the processes of endocytosis and exocytosis.

When an organism reproduces asexually it usually has

Mudskippers are a species of fish which, over thousands of generations, have developed adaptations that allow them not only to survive outside of the water, but to actually travel from one water source to another.

1. Some igneous rock forms from magma that cools slowly within Earth's crust. Briefly describe the most likely crystallization and texture of the rock.

In exploring for coal deposits, geologists sometimes look for fossil indicators: fossilized remains of Carboniferous plants. Which of the following combinations in a sample would suggest the presence of rocks that might bear coal beds? 1.

What is a simple statement that predicts the result of a controlled scientific experiment? Question 1 options: Observation Hypothesis Conclusion Theory SaveWhat is a simple statement that predicts the result of a controlled scientific experiment?

One region of the world has both the highest birth rate and the highest infant mortality rate. which is it?

What does food supply all living things with for life activities?

An 8-year-old has scabs and fluid-filled vesicles on her face, throat and stomach. Three weeks earlier she had visited her grandmother who had shingles. What infection does the 8-year-old have

Tropical forests contain dense trees, which allow less sunlight to penetrate. Emergent trees are trees that grow to a height of more than 45 to 55 meters, above the usual height of trees in tropical forests.