How many cell layers thick are the upper and lower epidermis

How can dinosaur fossils be in Antarctica a cold climate

The human respiratory system consists of many different cells, tissues, organs, and organ systems. explain the relationships between each level of organization within the respiratory system.

What type of weed is most troublesome for establishing turf from seed?

Scientific investigations most often start from observations of the natural world and which of the following? A) model B) computers C) variable D) questions

What are some characteristics of polyploidy plans

What place are sloths found?

In a solution of salt and water, which component is the solute? a. salt b. water c. beaker d. oxygen c

What are the two types of warm air masses that influence the weather in north america name and explain how they typically affect the weather

Which word describes an artificial pond with raised edges used for agriculture A) shaduf B) paddy C) aqueduct D) Chinampa

Why is dark matter difficult to measure? A) Because it does not exist in our galaxy. B) Because it disappears when it encounters ordinary matter. C) Because it creates so much heat it melts any instruments invented so far.