The ___ is also known as the age of fishes.

a. Cambrian

b. Devonian

c. Permian

d. Vendian

What are animals that do this in the soil: create holes for air and water to reach bedrock?

Select the correct answer. In a molecule of water, how many electrons are shared between each hydrogen atom and an oxygen atom?

The process of evolution is based on?

What system controls voluntary and involuntary life functions? A. Nervous System B. Skeletal System C. Digestive System D. Respiratory System

Why antibiotics are ineffective against viruses

Egg laying land animals have evolved to produce eggs with tough shells to ensure that

Which of the following statements describes a proton of an atom? A has a negative charge and is located in the nucleus. B has no charge and is located in the nucleus C has a positive charge and is located in outer energy levels.

What are reasons scientists use models? To study objects far away To study objects too large To study objects too small. To study objects easily found in a lab. To study events that take place over long periods of time.

1. true false Carbon atoms form the building blocks of most living things.

Inhibiting enzymes involved in cell wall synthesis leads to which of the following? A) cell death by osmotic lysisB) a reduction in protein synthesisC) the incomplete synthesis of the bacterial cell wallD) a reduction in the amount of usable energy