What was the first period of the Paleozoic era?

1. Siberian

2. Precambrian

3. Ordovician

4. Cambrian

How much time will it take light moving at 300,000 km/s to reach us from the sun? The sun is 15,000,000 km from earth.

Saltatory conduction: Group of answer choices: O can occur in unmyelinated axons O happens due to an even distribution of voltage-gated Na + channels O encodes only action potentials that are initiated in response to pain.

When you look outside on a cold morning, you might see dewdrops on leaves. which process causes dewdrops to form?

According to the phylogenetic tree, from which domain did Eukarya evolve? Select one:. a. Animals. b. Bacteria. c. Thermotoga. d. Archaea.

Which best describes how our understanding of DNA and inherited traits has changed over time

What must happen before the cell can go through mitosis? Interphase.

Belle's grandfather lives in a region where the temperature drops below 0*F at night. When belle visited her grandfather, they hiked up a hill. Belle noticed that a lot of rock had cracks in them.

The genetic condition of an organism that has two identical alleles for a given trait.

Which level of biological classification is the lowest level that butterflies

What might happen if a continent stops rifting apart?